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Finding the Fourth Proportional to 5,280.81, 7,918.01 and 2,645.25

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Solution

The fourth proportional to 5,280.81, 7,918.01 and 2,645.25 is: 3,966.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,280.81 : 7,918.01 = 2,645.25 : x
  2. Step 2: Convert to fraction form
    5,280.81/7,918.01 = 2,645.25/x
  3. Step 3: Cross multiply
    5,280.81x = 7,918.01 × 2,645.25
  4. Step 4: Simplify right side
    5,280.81x = 20,945,115.95
  5. Step 5: Solve for x
    x = 20,945,115.95/5,280.81
  6. Step 6: Final answer
    x = 3,966.27

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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.