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Finding the Fourth Proportional to 962.12, 1,442.66 and 345.74

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Solution

The fourth proportional to 962.12, 1,442.66 and 345.74 is: 518.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.12 : 1,442.66 = 345.74 : x
  2. Step 2: Convert to fraction form
    962.12/1,442.66 = 345.74/x
  3. Step 3: Cross multiply
    962.12x = 1,442.66 × 345.74
  4. Step 4: Simplify right side
    962.12x = 498,785.27
  5. Step 5: Solve for x
    x = 498,785.27/962.12
  6. Step 6: Final answer
    x = 518.42

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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.