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Finding the Fourth Proportional to 5,388.76, 8,080.54 and 1,878.69

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Solution

The fourth proportional to 5,388.76, 8,080.54 and 1,878.69 is: 2,817.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,388.76 : 8,080.54 = 1,878.69 : x
  2. Step 2: Convert to fraction form
    5,388.76/8,080.54 = 1,878.69/x
  3. Step 3: Cross multiply
    5,388.76x = 8,080.54 × 1,878.69
  4. Step 4: Simplify right side
    5,388.76x = 15,180,829.69
  5. Step 5: Solve for x
    x = 15,180,829.69/5,388.76
  6. Step 6: Final answer
    x = 2,817.13

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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.