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Finding the Fourth Proportional to 804,672.70, 1,207,009.05 and 431,424.70

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Solution

The fourth proportional to 804,672.70, 1,207,009.05 and 431,424.70 is: 647,137.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    804,672.70 : 1,207,009.05 = 431,424.70 : x
  2. Step 2: Convert to fraction form
    804,672.70/1,207,009.05 = 431,424.70/x
  3. Step 3: Cross multiply
    804,672.70x = 1,207,009.05 × 431,424.70
  4. Step 4: Simplify right side
    804,672.70x = 520,733,517,293.54
  5. Step 5: Solve for x
    x = 520,733,517,293.54/804,672.70
  6. Step 6: Final answer
    x = 647,137.05

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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.