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Finding the Fourth Proportional to 715,331.70, 987,243.57 and 429,009.30

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Solution

The fourth proportional to 715,331.70, 987,243.57 and 429,009.30 is: 592,084.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,331.70 : 987,243.57 = 429,009.30 : x
  2. Step 2: Convert to fraction form
    715,331.70/987,243.57 = 429,009.30/x
  3. Step 3: Cross multiply
    715,331.70x = 987,243.57 × 429,009.30
  4. Step 4: Simplify right side
    715,331.70x = 423,536,672,895.20
  5. Step 5: Solve for x
    x = 423,536,672,895.20/715,331.70
  6. Step 6: Final answer
    x = 592,084.31

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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.