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Finding the Fourth Proportional to 397,098.32, 547,998.60 and 215,810.96

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Solution

The fourth proportional to 397,098.32, 547,998.60 and 215,810.96 is: 297,820.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,098.32 : 547,998.60 = 215,810.96 : x
  2. Step 2: Convert to fraction form
    397,098.32/547,998.60 = 215,810.96/x
  3. Step 3: Cross multiply
    397,098.32x = 547,998.60 × 215,810.96
  4. Step 4: Simplify right side
    397,098.32x = 118,264,103,944.66
  5. Step 5: Solve for x
    x = 118,264,103,944.66/397,098.32
  6. Step 6: Final answer
    x = 297,820.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.