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Finding the Fourth Proportional to 962.18, 1,443.36 and 312.76

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Solution

The fourth proportional to 962.18, 1,443.36 and 312.76 is: 469.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.18 : 1,443.36 = 312.76 : x
  2. Step 2: Convert to fraction form
    962.18/1,443.36 = 312.76/x
  3. Step 3: Cross multiply
    962.18x = 1,443.36 × 312.76
  4. Step 4: Simplify right side
    962.18x = 451,422.84
  5. Step 5: Solve for x
    x = 451,422.84/962.18
  6. Step 6: Final answer
    x = 469.17

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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.