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Finding the Fourth Proportional to 1,513.92, 2,271.84 and 648.24

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Solution

The fourth proportional to 1,513.92, 2,271.84 and 648.24 is: 972.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,513.92 : 2,271.84 = 648.24 : x
  2. Step 2: Convert to fraction form
    1,513.92/2,271.84 = 648.24/x
  3. Step 3: Cross multiply
    1,513.92x = 2,271.84 × 648.24
  4. Step 4: Simplify right side
    1,513.92x = 1,472,697.56
  5. Step 5: Solve for x
    x = 1,472,697.56/1,513.92
  6. Step 6: Final answer
    x = 972.77

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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.