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Finding the Fourth Proportional to 962.12, 1,443.36 and 312.77

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Solution

The fourth proportional to 962.12, 1,443.36 and 312.77 is: 469.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.12 : 1,443.36 = 312.77 : x
  2. Step 2: Convert to fraction form
    962.12/1,443.36 = 312.77/x
  3. Step 3: Cross multiply
    962.12x = 1,443.36 × 312.77
  4. Step 4: Simplify right side
    962.12x = 451,439.71
  5. Step 5: Solve for x
    x = 451,439.71/962.12
  6. Step 6: Final answer
    x = 469.21

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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.