Home / 839,487.80-1,259,538.90-340,902.20

Finding the Fourth Proportional to 839,487.80, 1,259,538.90 and 340,902.20

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Solution

The fourth proportional to 839,487.80, 1,259,538.90 and 340,902.20 is: 511,478.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,487.80 : 1,259,538.90 = 340,902.20 : x
  2. Step 2: Convert to fraction form
    839,487.80/1,259,538.90 = 340,902.20/x
  3. Step 3: Cross multiply
    839,487.80x = 1,259,538.90 × 340,902.20
  4. Step 4: Simplify right side
    839,487.80x = 429,379,581,995.58
  5. Step 5: Solve for x
    x = 429,379,581,995.58/839,487.80
  6. Step 6: Final answer
    x = 511,478.05

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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.