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Finding the Fourth Proportional to 1,324.16, 1,985.74 and 502

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Solution

The fourth proportional to 1,324.16, 1,985.74 and 502 is: 752.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,324.16 : 1,985.74 = 502 : x
  2. Step 2: Convert to fraction form
    1,324.16/1,985.74 = 502/x
  3. Step 3: Cross multiply
    1,324.16x = 1,985.74 × 502
  4. Step 4: Simplify right side
    1,324.16x = 996,841.48
  5. Step 5: Solve for x
    x = 996,841.48/1,324.16
  6. Step 6: Final answer
    x = 752.81

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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.