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Finding the Fourth Proportional to 1,146.72, 1,720.08 and 479.94

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Solution

The fourth proportional to 1,146.72, 1,720.08 and 479.94 is: 719.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,146.72 : 1,720.08 = 479.94 : x
  2. Step 2: Convert to fraction form
    1,146.72/1,720.08 = 479.94/x
  3. Step 3: Cross multiply
    1,146.72x = 1,720.08 × 479.94
  4. Step 4: Simplify right side
    1,146.72x = 825,535.20
  5. Step 5: Solve for x
    x = 825,535.20/1,146.72
  6. Step 6: Final answer
    x = 719.91

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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.