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Finding the Fourth Proportional to 2,764.69, 4,147.62 and 915.70

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Solution

The fourth proportional to 2,764.69, 4,147.62 and 915.70 is: 1,373.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,764.69 : 4,147.62 = 915.70 : x
  2. Step 2: Convert to fraction form
    2,764.69/4,147.62 = 915.70/x
  3. Step 3: Cross multiply
    2,764.69x = 4,147.62 × 915.70
  4. Step 4: Simplify right side
    2,764.69x = 3,797,975.63
  5. Step 5: Solve for x
    x = 3,797,975.63/2,764.69
  6. Step 6: Final answer
    x = 1,373.74

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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.