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Finding the Fourth Proportional to 610,930.83, 915,204.21 and 399,929.07

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Solution

The fourth proportional to 610,930.83, 915,204.21 and 399,929.07 is: 599,113.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,930.83 : 915,204.21 = 399,929.07 : x
  2. Step 2: Convert to fraction form
    610,930.83/915,204.21 = 399,929.07/x
  3. Step 3: Cross multiply
    610,930.83x = 915,204.21 × 399,929.07
  4. Step 4: Simplify right side
    610,930.83x = 366,016,768,565.39
  5. Step 5: Solve for x
    x = 366,016,768,565.39/610,930.83
  6. Step 6: Final answer
    x = 599,113.27

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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.