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Finding the Fourth Proportional to 972.55, 1,341.91 and 552.76

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Solution

The fourth proportional to 972.55, 1,341.91 and 552.76 is: 762.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    972.55 : 1,341.91 = 552.76 : x
  2. Step 2: Convert to fraction form
    972.55/1,341.91 = 552.76/x
  3. Step 3: Cross multiply
    972.55x = 1,341.91 × 552.76
  4. Step 4: Simplify right side
    972.55x = 741,754.17
  5. Step 5: Solve for x
    x = 741,754.17/972.55
  6. Step 6: Final answer
    x = 762.69

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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.