Home / 5,385.66-8,078.60-1,490.10

Finding the Fourth Proportional to 5,385.66, 8,078.60 and 1,490.10

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Solution

The fourth proportional to 5,385.66, 8,078.60 and 1,490.10 is: 2,235.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,385.66 : 8,078.60 = 1,490.10 : x
  2. Step 2: Convert to fraction form
    5,385.66/8,078.60 = 1,490.10/x
  3. Step 3: Cross multiply
    5,385.66x = 8,078.60 × 1,490.10
  4. Step 4: Simplify right side
    5,385.66x = 12,037,921.86
  5. Step 5: Solve for x
    x = 12,037,921.86/5,385.66
  6. Step 6: Final answer
    x = 2,235.18

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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.