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Finding the Fourth Proportional to 1,513.64, 2,270.80 and 539.76

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Solution

The fourth proportional to 1,513.64, 2,270.80 and 539.76 is: 809.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,513.64 : 2,270.80 = 539.76 : x
  2. Step 2: Convert to fraction form
    1,513.64/2,270.80 = 539.76/x
  3. Step 3: Cross multiply
    1,513.64x = 2,270.80 × 539.76
  4. Step 4: Simplify right side
    1,513.64x = 1,225,687.01
  5. Step 5: Solve for x
    x = 1,225,687.01/1,513.64
  6. Step 6: Final answer
    x = 809.76

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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.