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Finding the Fourth Proportional to 5,311.88, 7,973.98 and 2,851.52

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Solution

The fourth proportional to 5,311.88, 7,973.98 and 2,851.52 is: 4,280.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,311.88 : 7,973.98 = 2,851.52 : x
  2. Step 2: Convert to fraction form
    5,311.88/7,973.98 = 2,851.52/x
  3. Step 3: Cross multiply
    5,311.88x = 7,973.98 × 2,851.52
  4. Step 4: Simplify right side
    5,311.88x = 22,737,963.45
  5. Step 5: Solve for x
    x = 22,737,963.45/5,311.88
  6. Step 6: Final answer
    x = 4,280.59

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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.