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Finding the Fourth Proportional to 610,939.58, 915,217.34 and 399,937.82

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Solution

The fourth proportional to 610,939.58, 915,217.34 and 399,937.82 is: 599,126.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,939.58 : 915,217.34 = 399,937.82 : x
  2. Step 2: Convert to fraction form
    610,939.58/915,217.34 = 399,937.82/x
  3. Step 3: Cross multiply
    610,939.58x = 915,217.34 × 399,937.82
  4. Step 4: Simplify right side
    610,939.58x = 366,030,027,785.80
  5. Step 5: Solve for x
    x = 366,030,027,785.80/610,939.58
  6. Step 6: Final answer
    x = 599,126.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.