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Finding the Fourth Proportional to 391,231.17, 586,886.52 and 135,030.39

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Solution

The fourth proportional to 391,231.17, 586,886.52 and 135,030.39 is: 202,559.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,231.17 : 586,886.52 = 135,030.39 : x
  2. Step 2: Convert to fraction form
    391,231.17/586,886.52 = 135,030.39/x
  3. Step 3: Cross multiply
    391,231.17x = 586,886.52 × 135,030.39
  4. Step 4: Simplify right side
    391,231.17x = 79,247,515,681.34
  5. Step 5: Solve for x
    x = 79,247,515,681.34/391,231.17
  6. Step 6: Final answer
    x = 202,559.31

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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.