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Finding the Fourth Proportional to 2,718.76, 4,077.78 and 771.10

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Solution

The fourth proportional to 2,718.76, 4,077.78 and 771.10 is: 1,156.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,718.76 : 4,077.78 = 771.10 : x
  2. Step 2: Convert to fraction form
    2,718.76/4,077.78 = 771.10/x
  3. Step 3: Cross multiply
    2,718.76x = 4,077.78 × 771.10
  4. Step 4: Simplify right side
    2,718.76x = 3,144,376.16
  5. Step 5: Solve for x
    x = 3,144,376.16/2,718.76
  6. Step 6: Final answer
    x = 1,156.55

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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.