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Finding the Fourth Proportional to 1,035.47, 1,553.34 and 487.77

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Solution

The fourth proportional to 1,035.47, 1,553.34 and 487.77 is: 731.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,035.47 : 1,553.34 = 487.77 : x
  2. Step 2: Convert to fraction form
    1,035.47/1,553.34 = 487.77/x
  3. Step 3: Cross multiply
    1,035.47x = 1,553.34 × 487.77
  4. Step 4: Simplify right side
    1,035.47x = 757,672.65
  5. Step 5: Solve for x
    x = 757,672.65/1,035.47
  6. Step 6: Final answer
    x = 731.72

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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.