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Finding the Fourth Proportional to 668,721.50, 922,851.87 and 366,915.50

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Solution

The fourth proportional to 668,721.50, 922,851.87 and 366,915.50 is: 506,352.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,721.50 : 922,851.87 = 366,915.50 : x
  2. Step 2: Convert to fraction form
    668,721.50/922,851.87 = 366,915.50/x
  3. Step 3: Cross multiply
    668,721.50x = 922,851.87 × 366,915.50
  4. Step 4: Simplify right side
    668,721.50x = 338,608,655,306.99
  5. Step 5: Solve for x
    x = 338,608,655,306.99/668,721.50
  6. Step 6: Final answer
    x = 506,352.28

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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.