Home / 1,353.28-2,030.11-487.40

Finding the Fourth Proportional to 1,353.28, 2,030.11 and 487.40

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Solution

The fourth proportional to 1,353.28, 2,030.11 and 487.40 is: 731.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,353.28 : 2,030.11 = 487.40 : x
  2. Step 2: Convert to fraction form
    1,353.28/2,030.11 = 487.40/x
  3. Step 3: Cross multiply
    1,353.28x = 2,030.11 × 487.40
  4. Step 4: Simplify right side
    1,353.28x = 989,475.61
  5. Step 5: Solve for x
    x = 989,475.61/1,353.28
  6. Step 6: Final answer
    x = 731.17

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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.