Home / 698,765.81-964,331.02-392,938.47

Finding the Fourth Proportional to 698,765.81, 964,331.02 and 392,938.47

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Solution

The fourth proportional to 698,765.81, 964,331.02 and 392,938.47 is: 542,274.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,765.81 : 964,331.02 = 392,938.47 : x
  2. Step 2: Convert to fraction form
    698,765.81/964,331.02 = 392,938.47/x
  3. Step 3: Cross multiply
    698,765.81x = 964,331.02 × 392,938.47
  4. Step 4: Simplify right side
    698,765.81x = 378,922,755,572.34
  5. Step 5: Solve for x
    x = 378,922,755,572.34/698,765.81
  6. Step 6: Final answer
    x = 542,274.32

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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.