Home / 3,115.90-4,671.04-1,140.15

Finding the Fourth Proportional to 3,115.90, 4,671.04 and 1,140.15

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Solution

The fourth proportional to 3,115.90, 4,671.04 and 1,140.15 is: 1,709.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.90 : 4,671.04 = 1,140.15 : x
  2. Step 2: Convert to fraction form
    3,115.90/4,671.04 = 1,140.15/x
  3. Step 3: Cross multiply
    3,115.90x = 4,671.04 × 1,140.15
  4. Step 4: Simplify right side
    3,115.90x = 5,325,686.26
  5. Step 5: Solve for x
    x = 5,325,686.26/3,115.90
  6. Step 6: Final answer
    x = 1,709.20

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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.