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Finding the Fourth Proportional to 407,276.72, 610,103.16 and 318,112.88

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Solution

The fourth proportional to 407,276.72, 610,103.16 and 318,112.88 is: 476,535.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,276.72 : 610,103.16 = 318,112.88 : x
  2. Step 2: Convert to fraction form
    407,276.72/610,103.16 = 318,112.88/x
  3. Step 3: Cross multiply
    407,276.72x = 610,103.16 × 318,112.88
  4. Step 4: Simplify right side
    407,276.72x = 194,081,673,324.70
  5. Step 5: Solve for x
    x = 194,081,673,324.70/407,276.72
  6. Step 6: Final answer
    x = 476,535.15

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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.