Home / 1,787.28-2,681.23-617.40

Finding the Fourth Proportional to 1,787.28, 2,681.23 and 617.40

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Solution

The fourth proportional to 1,787.28, 2,681.23 and 617.40 is: 926.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787.28 : 2,681.23 = 617.40 : x
  2. Step 2: Convert to fraction form
    1,787.28/2,681.23 = 617.40/x
  3. Step 3: Cross multiply
    1,787.28x = 2,681.23 × 617.40
  4. Step 4: Simplify right side
    1,787.28x = 1,655,391.40
  5. Step 5: Solve for x
    x = 1,655,391.40/1,787.28
  6. Step 6: Final answer
    x = 926.21

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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.