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Finding the Fourth Proportional to 885.96, 1,329.42 and 631.56

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Solution

The fourth proportional to 885.96, 1,329.42 and 631.56 is: 947.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.96 : 1,329.42 = 631.56 : x
  2. Step 2: Convert to fraction form
    885.96/1,329.42 = 631.56/x
  3. Step 3: Cross multiply
    885.96x = 1,329.42 × 631.56
  4. Step 4: Simplify right side
    885.96x = 839,608.50
  5. Step 5: Solve for x
    x = 839,608.50/885.96
  6. Step 6: Final answer
    x = 947.68

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Double scale
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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.