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Finding the Fourth Proportional to 278,998.68, 385,003.46 and 151,673.70

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Solution

The fourth proportional to 278,998.68, 385,003.46 and 151,673.70 is: 209,301.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,998.68 : 385,003.46 = 151,673.70 : x
  2. Step 2: Convert to fraction form
    278,998.68/385,003.46 = 151,673.70/x
  3. Step 3: Cross multiply
    278,998.68x = 385,003.46 × 151,673.70
  4. Step 4: Simplify right side
    278,998.68x = 58,394,899,291.00
  5. Step 5: Solve for x
    x = 58,394,899,291.00/278,998.68
  6. Step 6: Final answer
    x = 209,301.70

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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.