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Finding the Fourth Proportional to 888.70, 1,331.35 and 477.70

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Solution

The fourth proportional to 888.70, 1,331.35 and 477.70 is: 715.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.70 : 1,331.35 = 477.70 : x
  2. Step 2: Convert to fraction form
    888.70/1,331.35 = 477.70/x
  3. Step 3: Cross multiply
    888.70x = 1,331.35 × 477.70
  4. Step 4: Simplify right side
    888.70x = 635,985.90
  5. Step 5: Solve for x
    x = 635,985.90/888.70
  6. Step 6: Final answer
    x = 715.64

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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.