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Finding the Fourth Proportional to 1,627.68, 2,245.86 and 928.92

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Solution

The fourth proportional to 1,627.68, 2,245.86 and 928.92 is: 1,281.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,627.68 : 2,245.86 = 928.92 : x
  2. Step 2: Convert to fraction form
    1,627.68/2,245.86 = 928.92/x
  3. Step 3: Cross multiply
    1,627.68x = 2,245.86 × 928.92
  4. Step 4: Simplify right side
    1,627.68x = 2,086,224.27
  5. Step 5: Solve for x
    x = 2,086,224.27/1,627.68
  6. Step 6: Final answer
    x = 1,281.72

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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.