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Finding the Fourth Proportional to 688,694.25, 950,221.56 and 402,049.62

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Solution

The fourth proportional to 688,694.25, 950,221.56 and 402,049.62 is: 554,725.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,694.25 : 950,221.56 = 402,049.62 : x
  2. Step 2: Convert to fraction form
    688,694.25/950,221.56 = 402,049.62/x
  3. Step 3: Cross multiply
    688,694.25x = 950,221.56 × 402,049.62
  4. Step 4: Simplify right side
    688,694.25x = 382,036,217,113.81
  5. Step 5: Solve for x
    x = 382,036,217,113.81/688,694.25
  6. Step 6: Final answer
    x = 554,725.43

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Double scale
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Similar ratio
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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.