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Finding the Fourth Proportional to 2,510.13, 3,765.20 and 778.76

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Solution

The fourth proportional to 2,510.13, 3,765.20 and 778.76 is: 1,168.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,510.13 : 3,765.20 = 778.76 : x
  2. Step 2: Convert to fraction form
    2,510.13/3,765.20 = 778.76/x
  3. Step 3: Cross multiply
    2,510.13x = 3,765.20 × 778.76
  4. Step 4: Simplify right side
    2,510.13x = 2,932,170.27
  5. Step 5: Solve for x
    x = 2,932,170.27/2,510.13
  6. Step 6: Final answer
    x = 1,168.13

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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.