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Finding the Fourth Proportional to 1,500.92, 2,071.13 and 911.64

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Solution

The fourth proportional to 1,500.92, 2,071.13 and 911.64 is: 1,257.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,500.92 : 2,071.13 = 911.64 : x
  2. Step 2: Convert to fraction form
    1,500.92/2,071.13 = 911.64/x
  3. Step 3: Cross multiply
    1,500.92x = 2,071.13 × 911.64
  4. Step 4: Simplify right side
    1,500.92x = 1,888,124.95
  5. Step 5: Solve for x
    x = 1,888,124.95/1,500.92
  6. Step 6: Final answer
    x = 1,257.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.