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Finding the Fourth Proportional to 1,087.32, 1,630.30 and 437.30

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Solution

The fourth proportional to 1,087.32, 1,630.30 and 437.30 is: 655.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.32 : 1,630.30 = 437.30 : x
  2. Step 2: Convert to fraction form
    1,087.32/1,630.30 = 437.30/x
  3. Step 3: Cross multiply
    1,087.32x = 1,630.30 × 437.30
  4. Step 4: Simplify right side
    1,087.32x = 712,930.19
  5. Step 5: Solve for x
    x = 712,930.19/1,087.32
  6. Step 6: Final answer
    x = 655.68

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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.