Home / 858,489.40-1,287,734.10-543,302.20

Finding the Fourth Proportional to 858,489.40, 1,287,734.10 and 543,302.20

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Solution

The fourth proportional to 858,489.40, 1,287,734.10 and 543,302.20 is: 814,953.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,489.40 : 1,287,734.10 = 543,302.20 : x
  2. Step 2: Convert to fraction form
    858,489.40/1,287,734.10 = 543,302.20/x
  3. Step 3: Cross multiply
    858,489.40x = 1,287,734.10 × 543,302.20
  4. Step 4: Simplify right side
    858,489.40x = 699,628,769,545.02
  5. Step 5: Solve for x
    x = 699,628,769,545.02/858,489.40
  6. Step 6: Final answer
    x = 814,953.30

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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.