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Finding the Fourth Proportional to 1,207.71, 1,811.60 and 591.91

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Solution

The fourth proportional to 1,207.71, 1,811.60 and 591.91 is: 887.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.71 : 1,811.60 = 591.91 : x
  2. Step 2: Convert to fraction form
    1,207.71/1,811.60 = 591.91/x
  3. Step 3: Cross multiply
    1,207.71x = 1,811.60 × 591.91
  4. Step 4: Simplify right side
    1,207.71x = 1,072,304.16
  5. Step 5: Solve for x
    x = 1,072,304.16/1,207.71
  6. Step 6: Final answer
    x = 887.88

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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.