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Finding the Fourth Proportional to 972.42, 1,459.17 and 395.70

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Solution

The fourth proportional to 972.42, 1,459.17 and 395.70 is: 593.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    972.42 : 1,459.17 = 395.70 : x
  2. Step 2: Convert to fraction form
    972.42/1,459.17 = 395.70/x
  3. Step 3: Cross multiply
    972.42x = 1,459.17 × 395.70
  4. Step 4: Simplify right side
    972.42x = 577,393.57
  5. Step 5: Solve for x
    x = 577,393.57/972.42
  6. Step 6: Final answer
    x = 593.77

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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.