Home / 1,587.28-2,381.30-547.30

Finding the Fourth Proportional to 1,587.28, 2,381.30 and 547.30

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Solution

The fourth proportional to 1,587.28, 2,381.30 and 547.30 is: 821.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.28 : 2,381.30 = 547.30 : x
  2. Step 2: Convert to fraction form
    1,587.28/2,381.30 = 547.30/x
  3. Step 3: Cross multiply
    1,587.28x = 2,381.30 × 547.30
  4. Step 4: Simplify right side
    1,587.28x = 1,303,285.49
  5. Step 5: Solve for x
    x = 1,303,285.49/1,587.28
  6. Step 6: Final answer
    x = 821.08

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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.