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Finding the Fourth Proportional to 390,046.60, 584,195.10 and 320,062.60

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Solution

The fourth proportional to 390,046.60, 584,195.10 and 320,062.60 is: 479,376.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,046.60 : 584,195.10 = 320,062.60 : x
  2. Step 2: Convert to fraction form
    390,046.60/584,195.10 = 320,062.60/x
  3. Step 3: Cross multiply
    390,046.60x = 584,195.10 × 320,062.60
  4. Step 4: Simplify right side
    390,046.60x = 186,979,002,613.26
  5. Step 5: Solve for x
    x = 186,979,002,613.26/390,046.60
  6. Step 6: Final answer
    x = 479,376.06

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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.