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Finding the Fourth Proportional to 3,140.90, 4,711.22 and 832.40

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Solution

The fourth proportional to 3,140.90, 4,711.22 and 832.40 is: 1,248.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,140.90 : 4,711.22 = 832.40 : x
  2. Step 2: Convert to fraction form
    3,140.90/4,711.22 = 832.40/x
  3. Step 3: Cross multiply
    3,140.90x = 4,711.22 × 832.40
  4. Step 4: Simplify right side
    3,140.90x = 3,921,615.37
  5. Step 5: Solve for x
    x = 3,921,615.37/3,140.90
  6. Step 6: Final answer
    x = 1,248.56

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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.