Home / 1,423.28-2,134.08-729.92

Finding the Fourth Proportional to 1,423.28, 2,134.08 and 729.92

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Solution

The fourth proportional to 1,423.28, 2,134.08 and 729.92 is: 1,094.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423.28 : 2,134.08 = 729.92 : x
  2. Step 2: Convert to fraction form
    1,423.28/2,134.08 = 729.92/x
  3. Step 3: Cross multiply
    1,423.28x = 2,134.08 × 729.92
  4. Step 4: Simplify right side
    1,423.28x = 1,557,707.67
  5. Step 5: Solve for x
    x = 1,557,707.67/1,423.28
  6. Step 6: Final answer
    x = 1,094.45

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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.