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Finding the Fourth Proportional to 638,804.80, 958,207.20 and 323,876.80

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Solution

The fourth proportional to 638,804.80, 958,207.20 and 323,876.80 is: 485,815.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,804.80 : 958,207.20 = 323,876.80 : x
  2. Step 2: Convert to fraction form
    638,804.80/958,207.20 = 323,876.80/x
  3. Step 3: Cross multiply
    638,804.80x = 958,207.20 × 323,876.80
  4. Step 4: Simplify right side
    638,804.80x = 310,341,081,672.96
  5. Step 5: Solve for x
    x = 310,341,081,672.96/638,804.80
  6. Step 6: Final answer
    x = 485,815.20

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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.