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Finding the Fourth Proportional to 3,071.58, 4,608.02 and 991.70

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Solution

The fourth proportional to 3,071.58, 4,608.02 and 991.70 is: 1,487.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,071.58 : 4,608.02 = 991.70 : x
  2. Step 2: Convert to fraction form
    3,071.58/4,608.02 = 991.70/x
  3. Step 3: Cross multiply
    3,071.58x = 4,608.02 × 991.70
  4. Step 4: Simplify right side
    3,071.58x = 4,569,787.43
  5. Step 5: Solve for x
    x = 4,569,787.43/3,071.58
  6. Step 6: Final answer
    x = 1,487.76

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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.