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Finding the Fourth Proportional to 400,860.42, 552,805.74 and 239,689.86

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Solution

The fourth proportional to 400,860.42, 552,805.74 and 239,689.86 is: 330,543.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,860.42 : 552,805.74 = 239,689.86 : x
  2. Step 2: Convert to fraction form
    400,860.42/552,805.74 = 239,689.86/x
  3. Step 3: Cross multiply
    400,860.42x = 552,805.74 × 239,689.86
  4. Step 4: Simplify right side
    400,860.42x = 132,501,930,427.80
  5. Step 5: Solve for x
    x = 132,501,930,427.80/400,860.42
  6. Step 6: Final answer
    x = 330,543.81

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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.