Home / 638,136.20-957,204.30-389,304.20

Finding the Fourth Proportional to 638,136.20, 957,204.30 and 389,304.20

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Solution

The fourth proportional to 638,136.20, 957,204.30 and 389,304.20 is: 583,956.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,136.20 : 957,204.30 = 389,304.20 : x
  2. Step 2: Convert to fraction form
    638,136.20/957,204.30 = 389,304.20/x
  3. Step 3: Cross multiply
    638,136.20x = 957,204.30 × 389,304.20
  4. Step 4: Simplify right side
    638,136.20x = 372,643,654,248.06
  5. Step 5: Solve for x
    x = 372,643,654,248.06/638,136.20
  6. Step 6: Final answer
    x = 583,956.30

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Half scale
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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.