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Finding the Fourth Proportional to 487,356.60, 731,034.90 and 206,837.40

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Solution

The fourth proportional to 487,356.60, 731,034.90 and 206,837.40 is: 310,256.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,356.60 : 731,034.90 = 206,837.40 : x
  2. Step 2: Convert to fraction form
    487,356.60/731,034.90 = 206,837.40/x
  3. Step 3: Cross multiply
    487,356.60x = 731,034.90 × 206,837.40
  4. Step 4: Simplify right side
    487,356.60x = 151,205,358,025.26
  5. Step 5: Solve for x
    x = 151,205,358,025.26/487,356.60
  6. Step 6: Final answer
    x = 310,256.10

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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.