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Finding the Fourth Proportional to 3,572.60, 5,358.90 and 1,107.40

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Solution

The fourth proportional to 3,572.60, 5,358.90 and 1,107.40 is: 1,661.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,572.60 : 5,358.90 = 1,107.40 : x
  2. Step 2: Convert to fraction form
    3,572.60/5,358.90 = 1,107.40/x
  3. Step 3: Cross multiply
    3,572.60x = 5,358.90 × 1,107.40
  4. Step 4: Simplify right side
    3,572.60x = 5,934,445.86
  5. Step 5: Solve for x
    x = 5,934,445.86/3,572.60
  6. Step 6: Final answer
    x = 1,661.10

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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.