Home / 729,129.30-1,006,122.06-402,436.30

Finding the Fourth Proportional to 729,129.30, 1,006,122.06 and 402,436.30

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Solution

The fourth proportional to 729,129.30, 1,006,122.06 and 402,436.30 is: 555,319.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    729,129.30 : 1,006,122.06 = 402,436.30 : x
  2. Step 2: Convert to fraction form
    729,129.30/1,006,122.06 = 402,436.30/x
  3. Step 3: Cross multiply
    729,129.30x = 1,006,122.06 × 402,436.30
  4. Step 4: Simplify right side
    729,129.30x = 404,900,038,545.95
  5. Step 5: Solve for x
    x = 404,900,038,545.95/729,129.30
  6. Step 6: Final answer
    x = 555,319.94

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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.