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Finding the Fourth Proportional to 914.32, 1,262.28 and 631.18

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Solution

The fourth proportional to 914.32, 1,262.28 and 631.18 is: 871.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.32 : 1,262.28 = 631.18 : x
  2. Step 2: Convert to fraction form
    914.32/1,262.28 = 631.18/x
  3. Step 3: Cross multiply
    914.32x = 1,262.28 × 631.18
  4. Step 4: Simplify right side
    914.32x = 796,725.89
  5. Step 5: Solve for x
    x = 796,725.89/914.32
  6. Step 6: Final answer
    x = 871.39

Related Problems

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Half scale
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Double 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.