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Finding the Fourth Proportional to 665,443.80, 998,165.70 and 553,250.70

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Solution

The fourth proportional to 665,443.80, 998,165.70 and 553,250.70 is: 829,876.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,443.80 : 998,165.70 = 553,250.70 : x
  2. Step 2: Convert to fraction form
    665,443.80/998,165.70 = 553,250.70/x
  3. Step 3: Cross multiply
    665,443.80x = 998,165.70 × 553,250.70
  4. Step 4: Simplify right side
    665,443.80x = 552,235,872,240.99
  5. Step 5: Solve for x
    x = 552,235,872,240.99/665,443.80
  6. Step 6: Final answer
    x = 829,876.05

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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.