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Finding the Fourth Proportional to 2,767.85, 3,818.72 and 1,572.70

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Solution

The fourth proportional to 2,767.85, 3,818.72 and 1,572.70 is: 2,169.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,767.85 : 3,818.72 = 1,572.70 : x
  2. Step 2: Convert to fraction form
    2,767.85/3,818.72 = 1,572.70/x
  3. Step 3: Cross multiply
    2,767.85x = 3,818.72 × 1,572.70
  4. Step 4: Simplify right side
    2,767.85x = 6,005,687.47
  5. Step 5: Solve for x
    x = 6,005,687.47/2,767.85
  6. Step 6: Final answer
    x = 2,169.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.