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Finding the Fourth Proportional to 5,917.80, 8,876.70 and 4,978.20

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Solution

The fourth proportional to 5,917.80, 8,876.70 and 4,978.20 is: 7,467.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,917.80 : 8,876.70 = 4,978.20 : x
  2. Step 2: Convert to fraction form
    5,917.80/8,876.70 = 4,978.20/x
  3. Step 3: Cross multiply
    5,917.80x = 8,876.70 × 4,978.20
  4. Step 4: Simplify right side
    5,917.80x = 44,189,987.94
  5. Step 5: Solve for x
    x = 44,189,987.94/5,917.80
  6. Step 6: Final answer
    x = 7,467.30

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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.