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Finding the Fourth Proportional to 864.54, 1,296.15 and 447.62

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Solution

The fourth proportional to 864.54, 1,296.15 and 447.62 is: 671.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.54 : 1,296.15 = 447.62 : x
  2. Step 2: Convert to fraction form
    864.54/1,296.15 = 447.62/x
  3. Step 3: Cross multiply
    864.54x = 1,296.15 × 447.62
  4. Step 4: Simplify right side
    864.54x = 580,182.66
  5. Step 5: Solve for x
    x = 580,182.66/864.54
  6. Step 6: Final answer
    x = 671.09

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1.5x scale

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.