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Finding the Fourth Proportional to 371,679.60, 512,918.46 and 201,913.86

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Solution

The fourth proportional to 371,679.60, 512,918.46 and 201,913.86 is: 278,641.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,679.60 : 512,918.46 = 201,913.86 : x
  2. Step 2: Convert to fraction form
    371,679.60/512,918.46 = 201,913.86/x
  3. Step 3: Cross multiply
    371,679.60x = 512,918.46 × 201,913.86
  4. Step 4: Simplify right side
    371,679.60x = 103,565,346,123.86
  5. Step 5: Solve for x
    x = 103,565,346,123.86/371,679.60
  6. Step 6: Final answer
    x = 278,641.46

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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.