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Finding the Fourth Proportional to 5,280.80, 7,922.28 and 1,818.32

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Solution

The fourth proportional to 5,280.80, 7,922.28 and 1,818.32 is: 2,727.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,280.80 : 7,922.28 = 1,818.32 : x
  2. Step 2: Convert to fraction form
    5,280.80/7,922.28 = 1,818.32/x
  3. Step 3: Cross multiply
    5,280.80x = 7,922.28 × 1,818.32
  4. Step 4: Simplify right side
    5,280.80x = 14,405,240.17
  5. Step 5: Solve for x
    x = 14,405,240.17/5,280.80
  6. Step 6: Final answer
    x = 2,727.85

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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.