Home / 645,139,220.80-967,708,831.20-578,626,427.20

Finding the Fourth Proportional to 645,139,220.80, 967,708,831.20 and 578,626,427.20

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Solution

The fourth proportional to 645,139,220.80, 967,708,831.20 and 578,626,427.20 is: 867,939,640.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,139,220.80 : 967,708,831.20 = 578,626,427.20 : x
  2. Step 2: Convert to fraction form
    645,139,220.80/967,708,831.20 = 578,626,427.20/x
  3. Step 3: Cross multiply
    645,139,220.80x = 967,708,831.20 × 578,626,427.20
  4. Step 4: Simplify right side
    645,139,220.80x = 559,941,903,567,143,936
  5. Step 5: Solve for x
    x = 559,941,903,567,143,936/645,139,220.80
  6. Step 6: Final answer
    x = 867,939,640.80

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.