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Finding the Fourth Proportional to 653,872.80, 980,809.20 and 259,888.80

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Solution

The fourth proportional to 653,872.80, 980,809.20 and 259,888.80 is: 389,833.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,872.80 : 980,809.20 = 259,888.80 : x
  2. Step 2: Convert to fraction form
    653,872.80/980,809.20 = 259,888.80/x
  3. Step 3: Cross multiply
    653,872.80x = 980,809.20 × 259,888.80
  4. Step 4: Simplify right side
    653,872.80x = 254,901,326,016.96
  5. Step 5: Solve for x
    x = 254,901,326,016.96/653,872.80
  6. Step 6: Final answer
    x = 389,833.20

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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.