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Finding the Fourth Proportional to 787.25, 1,084.67 and 587.23

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Solution

The fourth proportional to 787.25, 1,084.67 and 587.23 is: 809.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    787.25 : 1,084.67 = 587.23 : x
  2. Step 2: Convert to fraction form
    787.25/1,084.67 = 587.23/x
  3. Step 3: Cross multiply
    787.25x = 1,084.67 × 587.23
  4. Step 4: Simplify right side
    787.25x = 636,950.76
  5. Step 5: Solve for x
    x = 636,950.76/787.25
  6. Step 6: Final answer
    x = 809.08

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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.