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Finding the Fourth Proportional to 3,008.79, 4,513.28 and 928.78

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Solution

The fourth proportional to 3,008.79, 4,513.28 and 928.78 is: 1,393.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,008.79 : 4,513.28 = 928.78 : x
  2. Step 2: Convert to fraction form
    3,008.79/4,513.28 = 928.78/x
  3. Step 3: Cross multiply
    3,008.79x = 4,513.28 × 928.78
  4. Step 4: Simplify right side
    3,008.79x = 4,191,844.20
  5. Step 5: Solve for x
    x = 4,191,844.20/3,008.79
  6. Step 6: Final answer
    x = 1,393.20

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Similar ratio
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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.