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Finding the Fourth Proportional to 643,798.20, 965,697.30 and 377,686.20

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Solution

The fourth proportional to 643,798.20, 965,697.30 and 377,686.20 is: 566,529.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,798.20 : 965,697.30 = 377,686.20 : x
  2. Step 2: Convert to fraction form
    643,798.20/965,697.30 = 377,686.20/x
  3. Step 3: Cross multiply
    643,798.20x = 965,697.30 × 377,686.20
  4. Step 4: Simplify right side
    643,798.20x = 364,730,543,587.26
  5. Step 5: Solve for x
    x = 364,730,543,587.26/643,798.20
  6. Step 6: Final answer
    x = 566,529.30

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Half scale
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Double scale
Find fourth proportional to 643,799.20, 965,698.80 and 377,687.20
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.