Home / 858,485.40-1,287,728.10-543,298.20

Finding the Fourth Proportional to 858,485.40, 1,287,728.10 and 543,298.20

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Solution

The fourth proportional to 858,485.40, 1,287,728.10 and 543,298.20 is: 814,947.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,485.40 : 1,287,728.10 = 543,298.20 : x
  2. Step 2: Convert to fraction form
    858,485.40/1,287,728.10 = 543,298.20/x
  3. Step 3: Cross multiply
    858,485.40x = 1,287,728.10 × 543,298.20
  4. Step 4: Simplify right side
    858,485.40x = 699,620,358,819.42
  5. Step 5: Solve for x
    x = 699,620,358,819.42/858,485.40
  6. Step 6: Final answer
    x = 814,947.30

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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.