Home / 638,863.40-958,295.10-358,344.20

Finding the Fourth Proportional to 638,863.40, 958,295.10 and 358,344.20

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Solution

The fourth proportional to 638,863.40, 958,295.10 and 358,344.20 is: 537,516.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,863.40 : 958,295.10 = 358,344.20 : x
  2. Step 2: Convert to fraction form
    638,863.40/958,295.10 = 358,344.20/x
  3. Step 3: Cross multiply
    638,863.40x = 958,295.10 × 358,344.20
  4. Step 4: Simplify right side
    638,863.40x = 343,399,490,973.42
  5. Step 5: Solve for x
    x = 343,399,490,973.42/638,863.40
  6. Step 6: Final answer
    x = 537,516.30

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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.