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Finding the Fourth Proportional to 680,429.12, 938,831.96 and 571,945.80

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Solution

The fourth proportional to 680,429.12, 938,831.96 and 571,945.80 is: 789,150.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,429.12 : 938,831.96 = 571,945.80 : x
  2. Step 2: Convert to fraction form
    680,429.12/938,831.96 = 571,945.80/x
  3. Step 3: Cross multiply
    680,429.12x = 938,831.96 × 571,945.80
  4. Step 4: Simplify right side
    680,429.12x = 536,960,996,427.77
  5. Step 5: Solve for x
    x = 536,960,996,427.77/680,429.12
  6. Step 6: Final answer
    x = 789,150.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.