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Finding the Fourth Proportional to 559,427.80, 839,141.70 and 259,808.80

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Solution

The fourth proportional to 559,427.80, 839,141.70 and 259,808.80 is: 389,713.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,427.80 : 839,141.70 = 259,808.80 : x
  2. Step 2: Convert to fraction form
    559,427.80/839,141.70 = 259,808.80/x
  3. Step 3: Cross multiply
    559,427.80x = 839,141.70 × 259,808.80
  4. Step 4: Simplify right side
    559,427.80x = 218,016,398,106.96
  5. Step 5: Solve for x
    x = 218,016,398,106.96/559,427.80
  6. Step 6: Final answer
    x = 389,713.20

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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.