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Finding the Fourth Proportional to 864.89, 1,295.50 and 587.41

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Solution

The fourth proportional to 864.89, 1,295.50 and 587.41 is: 879.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.89 : 1,295.50 = 587.41 : x
  2. Step 2: Convert to fraction form
    864.89/1,295.50 = 587.41/x
  3. Step 3: Cross multiply
    864.89x = 1,295.50 × 587.41
  4. Step 4: Simplify right side
    864.89x = 760,989.66
  5. Step 5: Solve for x
    x = 760,989.66/864.89
  6. Step 6: Final answer
    x = 879.87

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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.