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Finding the Fourth Proportional to 4,728.40, 7,086.52 and 2,538

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Solution

The fourth proportional to 4,728.40, 7,086.52 and 2,538 is: 3,803.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,728.40 : 7,086.52 = 2,538 : x
  2. Step 2: Convert to fraction form
    4,728.40/7,086.52 = 2,538/x
  3. Step 3: Cross multiply
    4,728.40x = 7,086.52 × 2,538
  4. Step 4: Simplify right side
    4,728.40x = 17,985,587.76
  5. Step 5: Solve for x
    x = 17,985,587.76/4,728.40
  6. Step 6: Final answer
    x = 3,803.74

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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.