Home / 2,117.60-3,176.40-947.15

Finding the Fourth Proportional to 2,117.60, 3,176.40 and 947.15

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Solution

The fourth proportional to 2,117.60, 3,176.40 and 947.15 is: 1,420.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,117.60 : 3,176.40 = 947.15 : x
  2. Step 2: Convert to fraction form
    2,117.60/3,176.40 = 947.15/x
  3. Step 3: Cross multiply
    2,117.60x = 3,176.40 × 947.15
  4. Step 4: Simplify right side
    2,117.60x = 3,008,527.26
  5. Step 5: Solve for x
    x = 3,008,527.26/2,117.60
  6. Step 6: Final answer
    x = 1,420.73

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Similar ratio
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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.