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Finding the Fourth Proportional to 867.59, 1,197.40 and 552.99

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Solution

The fourth proportional to 867.59, 1,197.40 and 552.99 is: 763.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.59 : 1,197.40 = 552.99 : x
  2. Step 2: Convert to fraction form
    867.59/1,197.40 = 552.99/x
  3. Step 3: Cross multiply
    867.59x = 1,197.40 × 552.99
  4. Step 4: Simplify right side
    867.59x = 662,144.24
  5. Step 5: Solve for x
    x = 662,144.24/867.59
  6. Step 6: Final answer
    x = 763.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.