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Finding the Fourth Proportional to 5,145.78, 7,718.61 and 1,250.22

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Solution

The fourth proportional to 5,145.78, 7,718.61 and 1,250.22 is: 1,875.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.78 : 7,718.61 = 1,250.22 : x
  2. Step 2: Convert to fraction form
    5,145.78/7,718.61 = 1,250.22/x
  3. Step 3: Cross multiply
    5,145.78x = 7,718.61 × 1,250.22
  4. Step 4: Simplify right side
    5,145.78x = 9,649,960.59
  5. Step 5: Solve for x
    x = 9,649,960.59/5,145.78
  6. Step 6: Final answer
    x = 1,875.32

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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.