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Finding the Fourth Proportional to 2,776.47, 4,164.70 and 724.47

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Solution

The fourth proportional to 2,776.47, 4,164.70 and 724.47 is: 1,086.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,776.47 : 4,164.70 = 724.47 : x
  2. Step 2: Convert to fraction form
    2,776.47/4,164.70 = 724.47/x
  3. Step 3: Cross multiply
    2,776.47x = 4,164.70 × 724.47
  4. Step 4: Simplify right side
    2,776.47x = 3,017,202.02
  5. Step 5: Solve for x
    x = 3,017,202.02/2,776.47
  6. Step 6: Final answer
    x = 1,086.70

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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.