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Finding the Fourth Proportional to 1,487.08, 2,230.12 and 512.96

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Solution

The fourth proportional to 1,487.08, 2,230.12 and 512.96 is: 769.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,487.08 : 2,230.12 = 512.96 : x
  2. Step 2: Convert to fraction form
    1,487.08/2,230.12 = 512.96/x
  3. Step 3: Cross multiply
    1,487.08x = 2,230.12 × 512.96
  4. Step 4: Simplify right side
    1,487.08x = 1,143,962.36
  5. Step 5: Solve for x
    x = 1,143,962.36/1,487.08
  6. Step 6: Final answer
    x = 769.27

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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.