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Finding the Fourth Proportional to 787.83, 1,087.28 and 588.32

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Solution

The fourth proportional to 787.83, 1,087.28 and 588.32 is: 811.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    787.83 : 1,087.28 = 588.32 : x
  2. Step 2: Convert to fraction form
    787.83/1,087.28 = 588.32/x
  3. Step 3: Cross multiply
    787.83x = 1,087.28 × 588.32
  4. Step 4: Simplify right side
    787.83x = 639,663.13
  5. Step 5: Solve for x
    x = 639,663.13/787.83
  6. Step 6: Final answer
    x = 811.93

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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.