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Finding the Fourth Proportional to 1,487.47, 2,230.37 and 499.76

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Solution

The fourth proportional to 1,487.47, 2,230.37 and 499.76 is: 749.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,487.47 : 2,230.37 = 499.76 : x
  2. Step 2: Convert to fraction form
    1,487.47/2,230.37 = 499.76/x
  3. Step 3: Cross multiply
    1,487.47x = 2,230.37 × 499.76
  4. Step 4: Simplify right side
    1,487.47x = 1,114,649.71
  5. Step 5: Solve for x
    x = 1,114,649.71/1,487.47
  6. Step 6: Final answer
    x = 749.36

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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.