Home / 1,118,831.80-1,678,247.70-320,139.40

Finding the Fourth Proportional to 1,118,831.80, 1,678,247.70 and 320,139.40

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Solution

The fourth proportional to 1,118,831.80, 1,678,247.70 and 320,139.40 is: 480,209.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,118,831.80 : 1,678,247.70 = 320,139.40 : x
  2. Step 2: Convert to fraction form
    1,118,831.80/1,678,247.70 = 320,139.40/x
  3. Step 3: Cross multiply
    1,118,831.80x = 1,678,247.70 × 320,139.40
  4. Step 4: Simplify right side
    1,118,831.80x = 537,273,211,729.38
  5. Step 5: Solve for x
    x = 537,273,211,729.38/1,118,831.80
  6. Step 6: Final answer
    x = 480,209.10

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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.