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Finding the Fourth Proportional to 1,162.71, 1,604.48 and 638.75

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Solution

The fourth proportional to 1,162.71, 1,604.48 and 638.75 is: 881.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,162.71 : 1,604.48 = 638.75 : x
  2. Step 2: Convert to fraction form
    1,162.71/1,604.48 = 638.75/x
  3. Step 3: Cross multiply
    1,162.71x = 1,604.48 × 638.75
  4. Step 4: Simplify right side
    1,162.71x = 1,024,861.60
  5. Step 5: Solve for x
    x = 1,024,861.60/1,162.71
  6. Step 6: Final answer
    x = 881.45

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Half scale
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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.