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Finding the Fourth Proportional to 3,107.97, 4,661.35 and 916.11

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Solution

The fourth proportional to 3,107.97, 4,661.35 and 916.11 is: 1,373.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.97 : 4,661.35 = 916.11 : x
  2. Step 2: Convert to fraction form
    3,107.97/4,661.35 = 916.11/x
  3. Step 3: Cross multiply
    3,107.97x = 4,661.35 × 916.11
  4. Step 4: Simplify right side
    3,107.97x = 4,270,307.06
  5. Step 5: Solve for x
    x = 4,270,307.06/3,107.97
  6. Step 6: Final answer
    x = 1,373.99

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Double scale
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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.