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Finding the Fourth Proportional to 962.80, 1,443.97 and 313.18

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Solution

The fourth proportional to 962.80, 1,443.97 and 313.18 is: 469.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.80 : 1,443.97 = 313.18 : x
  2. Step 2: Convert to fraction form
    962.80/1,443.97 = 313.18/x
  3. Step 3: Cross multiply
    962.80x = 1,443.97 × 313.18
  4. Step 4: Simplify right side
    962.80x = 452,222.52
  5. Step 5: Solve for x
    x = 452,222.52/962.80
  6. Step 6: Final answer
    x = 469.70

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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.