Home / 5,385.78-8,079.37-1,490.22

Finding the Fourth Proportional to 5,385.78, 8,079.37 and 1,490.22

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Solution

The fourth proportional to 5,385.78, 8,079.37 and 1,490.22 is: 2,235.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,385.78 : 8,079.37 = 1,490.22 : x
  2. Step 2: Convert to fraction form
    5,385.78/8,079.37 = 1,490.22/x
  3. Step 3: Cross multiply
    5,385.78x = 8,079.37 × 1,490.22
  4. Step 4: Simplify right side
    5,385.78x = 12,040,035.04
  5. Step 5: Solve for x
    x = 12,040,035.04/5,385.78
  6. Step 6: Final answer
    x = 2,235.52

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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.