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Finding the Fourth Proportional to 390,140.75, 585,211.13 and 94,652.75

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Solution

The fourth proportional to 390,140.75, 585,211.13 and 94,652.75 is: 141,979.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,140.75 : 585,211.13 = 94,652.75 : x
  2. Step 2: Convert to fraction form
    390,140.75/585,211.13 = 94,652.75/x
  3. Step 3: Cross multiply
    390,140.75x = 585,211.13 × 94,652.75
  4. Step 4: Simplify right side
    390,140.75x = 55,391,842,785.11
  5. Step 5: Solve for x
    x = 55,391,842,785.11/390,140.75
  6. Step 6: Final answer
    x = 141,979.13

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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.