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Finding the Fourth Proportional to 3,117.92, 4,676.88 and 926.64

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Solution

The fourth proportional to 3,117.92, 4,676.88 and 926.64 is: 1,389.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,117.92 : 4,676.88 = 926.64 : x
  2. Step 2: Convert to fraction form
    3,117.92/4,676.88 = 926.64/x
  3. Step 3: Cross multiply
    3,117.92x = 4,676.88 × 926.64
  4. Step 4: Simplify right side
    3,117.92x = 4,333,784.08
  5. Step 5: Solve for x
    x = 4,333,784.08/3,117.92
  6. Step 6: Final answer
    x = 1,389.96

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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.