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Finding the Fourth Proportional to 1,207.62, 1,812.45 and 477.71

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Solution

The fourth proportional to 1,207.62, 1,812.45 and 477.71 is: 716.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.62 : 1,812.45 = 477.71 : x
  2. Step 2: Convert to fraction form
    1,207.62/1,812.45 = 477.71/x
  3. Step 3: Cross multiply
    1,207.62x = 1,812.45 × 477.71
  4. Step 4: Simplify right side
    1,207.62x = 865,816.43
  5. Step 5: Solve for x
    x = 865,816.43/1,207.62
  6. Step 6: Final answer
    x = 716.96

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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.