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Finding the Fourth Proportional to 5,151.84, 7,728.96 and 1,689.12

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Solution

The fourth proportional to 5,151.84, 7,728.96 and 1,689.12 is: 2,534.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,151.84 : 7,728.96 = 1,689.12 : x
  2. Step 2: Convert to fraction form
    5,151.84/7,728.96 = 1,689.12/x
  3. Step 3: Cross multiply
    5,151.84x = 7,728.96 × 1,689.12
  4. Step 4: Simplify right side
    5,151.84x = 13,055,140.92
  5. Step 5: Solve for x
    x = 13,055,140.92/5,151.84
  6. Step 6: Final answer
    x = 2,534.07

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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.