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Finding the Fourth Proportional to 5,280.70, 7,914.04 and 2,810.20

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Solution

The fourth proportional to 5,280.70, 7,914.04 and 2,810.20 is: 4,211.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,280.70 : 7,914.04 = 2,810.20 : x
  2. Step 2: Convert to fraction form
    5,280.70/7,914.04 = 2,810.20/x
  3. Step 3: Cross multiply
    5,280.70x = 7,914.04 × 2,810.20
  4. Step 4: Simplify right side
    5,280.70x = 22,240,035.21
  5. Step 5: Solve for x
    x = 22,240,035.21/5,280.70
  6. Step 6: Final answer
    x = 4,211.57

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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.