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Finding the Fourth Proportional to 972.97, 1,459.40 and 242.55

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Solution

The fourth proportional to 972.97, 1,459.40 and 242.55 is: 363.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    972.97 : 1,459.40 = 242.55 : x
  2. Step 2: Convert to fraction form
    972.97/1,459.40 = 242.55/x
  3. Step 3: Cross multiply
    972.97x = 1,459.40 × 242.55
  4. Step 4: Simplify right side
    972.97x = 353,976.26
  5. Step 5: Solve for x
    x = 353,976.26/972.97
  6. Step 6: Final answer
    x = 363.81

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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.