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Finding the Fourth Proportional to 390,135.83, 585,087.10 and 203,045.27

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Solution

The fourth proportional to 390,135.83, 585,087.10 and 203,045.27 is: 304,507.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,135.83 : 585,087.10 = 203,045.27 : x
  2. Step 2: Convert to fraction form
    390,135.83/585,087.10 = 203,045.27/x
  3. Step 3: Cross multiply
    390,135.83x = 585,087.10 × 203,045.27
  4. Step 4: Simplify right side
    390,135.83x = 118,799,164,759.97
  5. Step 5: Solve for x
    x = 118,799,164,759.97/390,135.83
  6. Step 6: Final answer
    x = 304,507.19

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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.