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Finding the Fourth Proportional to 874,438.12, 1,311,691.74 and 243,407.08

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Solution

The fourth proportional to 874,438.12, 1,311,691.74 and 243,407.08 is: 365,120.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,438.12 : 1,311,691.74 = 243,407.08 : x
  2. Step 2: Convert to fraction form
    874,438.12/1,311,691.74 = 243,407.08/x
  3. Step 3: Cross multiply
    874,438.12x = 1,311,691.74 × 243,407.08
  4. Step 4: Simplify right side
    874,438.12x = 319,275,056,293.52
  5. Step 5: Solve for x
    x = 319,275,056,293.52/874,438.12
  6. Step 6: Final answer
    x = 365,120.24

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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.