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Finding the Fourth Proportional to 5,280.52, 7,921.02 and 1,818.28

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Solution

The fourth proportional to 5,280.52, 7,921.02 and 1,818.28 is: 2,727.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,280.52 : 7,921.02 = 1,818.28 : x
  2. Step 2: Convert to fraction form
    5,280.52/7,921.02 = 1,818.28/x
  3. Step 3: Cross multiply
    5,280.52x = 7,921.02 × 1,818.28
  4. Step 4: Simplify right side
    5,280.52x = 14,402,632.25
  5. Step 5: Solve for x
    x = 14,402,632.25/5,280.52
  6. Step 6: Final answer
    x = 2,727.50

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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.