Home / 643,436.90-965,131.08-194,145.78

Finding the Fourth Proportional to 643,436.90, 965,131.08 and 194,145.78

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Solution

The fourth proportional to 643,436.90, 965,131.08 and 194,145.78 is: 291,211.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,436.90 : 965,131.08 = 194,145.78 : x
  2. Step 2: Convert to fraction form
    643,436.90/965,131.08 = 194,145.78/x
  3. Step 3: Cross multiply
    643,436.90x = 965,131.08 × 194,145.78
  4. Step 4: Simplify right side
    643,436.90x = 187,376,126,328.84
  5. Step 5: Solve for x
    x = 187,376,126,328.84/643,436.90
  6. Step 6: Final answer
    x = 291,211.35

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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.