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Finding the Fourth Proportional to 2,753.28, 4,130.16 and 778.92

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Solution

The fourth proportional to 2,753.28, 4,130.16 and 778.92 is: 1,168.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,753.28 : 4,130.16 = 778.92 : x
  2. Step 2: Convert to fraction form
    2,753.28/4,130.16 = 778.92/x
  3. Step 3: Cross multiply
    2,753.28x = 4,130.16 × 778.92
  4. Step 4: Simplify right side
    2,753.28x = 3,217,045.82
  5. Step 5: Solve for x
    x = 3,217,045.82/2,753.28
  6. Step 6: Final answer
    x = 1,168.44

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1.5x scale

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.