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Finding the Fourth Proportional to 962.61, 1,443.60 and 313.19

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Solution

The fourth proportional to 962.61, 1,443.60 and 313.19 is: 469.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.61 : 1,443.60 = 313.19 : x
  2. Step 2: Convert to fraction form
    962.61/1,443.60 = 313.19/x
  3. Step 3: Cross multiply
    962.61x = 1,443.60 × 313.19
  4. Step 4: Simplify right side
    962.61x = 452,121.08
  5. Step 5: Solve for x
    x = 452,121.08/962.61
  6. Step 6: Final answer
    x = 469.68

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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.