Home / 1,347,419.20-2,021,128.80-638,831.20

Finding the Fourth Proportional to 1,347,419.20, 2,021,128.80 and 638,831.20

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Solution

The fourth proportional to 1,347,419.20, 2,021,128.80 and 638,831.20 is: 958,246.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,347,419.20 : 2,021,128.80 = 638,831.20 : x
  2. Step 2: Convert to fraction form
    1,347,419.20/2,021,128.80 = 638,831.20/x
  3. Step 3: Cross multiply
    1,347,419.20x = 2,021,128.80 × 638,831.20
  4. Step 4: Simplify right side
    1,347,419.20x = 1,291,160,136,658.56
  5. Step 5: Solve for x
    x = 1,291,160,136,658.56/1,347,419.20
  6. Step 6: Final answer
    x = 958,246.80

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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.