Home / 2,191.61-3,287.45-631.73

Finding the Fourth Proportional to 2,191.61, 3,287.45 and 631.73

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Solution

The fourth proportional to 2,191.61, 3,287.45 and 631.73 is: 947.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,191.61 : 3,287.45 = 631.73 : x
  2. Step 2: Convert to fraction form
    2,191.61/3,287.45 = 631.73/x
  3. Step 3: Cross multiply
    2,191.61x = 3,287.45 × 631.73
  4. Step 4: Simplify right side
    2,191.61x = 2,076,765.93
  5. Step 5: Solve for x
    x = 2,076,765.93/2,191.61
  6. Step 6: Final answer
    x = 947.60

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Double scale
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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.