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Finding the Fourth Proportional to 1,517.72, 2,276.60 and 478.00

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Solution

The fourth proportional to 1,517.72, 2,276.60 and 478.00 is: 717.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,517.72 : 2,276.60 = 478.00 : x
  2. Step 2: Convert to fraction form
    1,517.72/2,276.60 = 478.00/x
  3. Step 3: Cross multiply
    1,517.72x = 2,276.60 × 478.00
  4. Step 4: Simplify right side
    1,517.72x = 1,088,206.72
  5. Step 5: Solve for x
    x = 1,088,206.72/1,517.72
  6. Step 6: Final answer
    x = 717.00

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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.