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Finding the Fourth Proportional to 962.16, 1,443.24 and 312.88

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Solution

The fourth proportional to 962.16, 1,443.24 and 312.88 is: 469.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.16 : 1,443.24 = 312.88 : x
  2. Step 2: Convert to fraction form
    962.16/1,443.24 = 312.88/x
  3. Step 3: Cross multiply
    962.16x = 1,443.24 × 312.88
  4. Step 4: Simplify right side
    962.16x = 451,560.93
  5. Step 5: Solve for x
    x = 451,560.93/962.16
  6. Step 6: Final answer
    x = 469.32

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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.