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Finding the Fourth Proportional to 807.88, 1,115.58 and 632.92

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Solution

The fourth proportional to 807.88, 1,115.58 and 632.92 is: 873.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    807.88 : 1,115.58 = 632.92 : x
  2. Step 2: Convert to fraction form
    807.88/1,115.58 = 632.92/x
  3. Step 3: Cross multiply
    807.88x = 1,115.58 × 632.92
  4. Step 4: Simplify right side
    807.88x = 706,072.89
  5. Step 5: Solve for x
    x = 706,072.89/807.88
  6. Step 6: Final answer
    x = 873.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.