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Finding the Fourth Proportional to 5,436.88, 7,502.62 and 3,078.88

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Solution

The fourth proportional to 5,436.88, 7,502.62 and 3,078.88 is: 4,248.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,436.88 : 7,502.62 = 3,078.88 : x
  2. Step 2: Convert to fraction form
    5,436.88/7,502.62 = 3,078.88/x
  3. Step 3: Cross multiply
    5,436.88x = 7,502.62 × 3,078.88
  4. Step 4: Simplify right side
    5,436.88x = 23,099,666.67
  5. Step 5: Solve for x
    x = 23,099,666.67/5,436.88
  6. Step 6: Final answer
    x = 4,248.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.