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Finding the Fourth Proportional to 715,343.70, 987,260.13 and 429,021.30

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Solution

The fourth proportional to 715,343.70, 987,260.13 and 429,021.30 is: 592,100.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,343.70 : 987,260.13 = 429,021.30 : x
  2. Step 2: Convert to fraction form
    715,343.70/987,260.13 = 429,021.30/x
  3. Step 3: Cross multiply
    715,343.70x = 987,260.13 × 429,021.30
  4. Step 4: Simplify right side
    715,343.70x = 423,555,624,410.77
  5. Step 5: Solve for x
    x = 423,555,624,410.77/715,343.70
  6. Step 6: Final answer
    x = 592,100.87

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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.