Home / 851,229.60-1,276,844.40-431,325.60

Finding the Fourth Proportional to 851,229.60, 1,276,844.40 and 431,325.60

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Solution

The fourth proportional to 851,229.60, 1,276,844.40 and 431,325.60 is: 646,988.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    851,229.60 : 1,276,844.40 = 431,325.60 : x
  2. Step 2: Convert to fraction form
    851,229.60/1,276,844.40 = 431,325.60/x
  3. Step 3: Cross multiply
    851,229.60x = 1,276,844.40 × 431,325.60
  4. Step 4: Simplify right side
    851,229.60x = 550,735,676,936.64
  5. Step 5: Solve for x
    x = 550,735,676,936.64/851,229.60
  6. Step 6: Final answer
    x = 646,988.40

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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.