Home / 1,787.20-2,680.67-554.58

Finding the Fourth Proportional to 1,787.20, 2,680.67 and 554.58

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Solution

The fourth proportional to 1,787.20, 2,680.67 and 554.58 is: 831.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787.20 : 2,680.67 = 554.58 : x
  2. Step 2: Convert to fraction form
    1,787.20/2,680.67 = 554.58/x
  3. Step 3: Cross multiply
    1,787.20x = 2,680.67 × 554.58
  4. Step 4: Simplify right side
    1,787.20x = 1,486,631.18
  5. Step 5: Solve for x
    x = 1,486,631.18/1,787.20
  6. Step 6: Final answer
    x = 831.82

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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.