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Finding the Fourth Proportional to 639,246.30, 958,869.45 and 239,900.10

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Solution

The fourth proportional to 639,246.30, 958,869.45 and 239,900.10 is: 359,850.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,246.30 : 958,869.45 = 239,900.10 : x
  2. Step 2: Convert to fraction form
    639,246.30/958,869.45 = 239,900.10/x
  3. Step 3: Cross multiply
    639,246.30x = 958,869.45 × 239,900.10
  4. Step 4: Simplify right side
    639,246.30x = 230,032,876,941.95
  5. Step 5: Solve for x
    x = 230,032,876,941.95/639,246.30
  6. Step 6: Final answer
    x = 359,850.15

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Half scale
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Double scale
Find fourth proportional to 639,247.30, 958,870.95 and 239,901.10
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.