Home / 724,806.40-1,086,784.08-219,215.20

Finding the Fourth Proportional to 724,806.40, 1,086,784.08 and 219,215.20

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Solution

The fourth proportional to 724,806.40, 1,086,784.08 and 219,215.20 is: 328,694.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,806.40 : 1,086,784.08 = 219,215.20 : x
  2. Step 2: Convert to fraction form
    724,806.40/1,086,784.08 = 219,215.20/x
  3. Step 3: Cross multiply
    724,806.40x = 1,086,784.08 × 219,215.20
  4. Step 4: Simplify right side
    724,806.40x = 238,239,589,454.02
  5. Step 5: Solve for x
    x = 238,239,589,454.02/724,806.40
  6. Step 6: Final answer
    x = 328,694.10

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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.