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Finding the Fourth Proportional to 866.24, 1,299.88 and 501.20

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Solution

The fourth proportional to 866.24, 1,299.88 and 501.20 is: 752.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    866.24 : 1,299.88 = 501.20 : x
  2. Step 2: Convert to fraction form
    866.24/1,299.88 = 501.20/x
  3. Step 3: Cross multiply
    866.24x = 1,299.88 × 501.20
  4. Step 4: Simplify right side
    866.24x = 651,499.86
  5. Step 5: Solve for x
    x = 651,499.86/866.24
  6. Step 6: Final answer
    x = 752.10

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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.