Home / 839,911.20-1,259,866.80-390,482.70

Finding the Fourth Proportional to 839,911.20, 1,259,866.80 and 390,482.70

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Solution

The fourth proportional to 839,911.20, 1,259,866.80 and 390,482.70 is: 585,724.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,911.20 : 1,259,866.80 = 390,482.70 : x
  2. Step 2: Convert to fraction form
    839,911.20/1,259,866.80 = 390,482.70/x
  3. Step 3: Cross multiply
    839,911.20x = 1,259,866.80 × 390,482.70
  4. Step 4: Simplify right side
    839,911.20x = 491,956,189,704.36
  5. Step 5: Solve for x
    x = 491,956,189,704.36/839,911.20
  6. Step 6: Final answer
    x = 585,724.05

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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.