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Finding the Fourth Proportional to 5,151.62, 7,728.56 and 1,642.70

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Solution

The fourth proportional to 5,151.62, 7,728.56 and 1,642.70 is: 2,464.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,151.62 : 7,728.56 = 1,642.70 : x
  2. Step 2: Convert to fraction form
    5,151.62/7,728.56 = 1,642.70/x
  3. Step 3: Cross multiply
    5,151.62x = 7,728.56 × 1,642.70
  4. Step 4: Simplify right side
    5,151.62x = 12,695,658.66
  5. Step 5: Solve for x
    x = 12,695,658.66/5,151.62
  6. Step 6: Final answer
    x = 2,464.40

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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.