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Finding the Fourth Proportional to 278,989.60, 385,009.44 and 151,667.92

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Solution

The fourth proportional to 278,989.60, 385,009.44 and 151,667.92 is: 209,303.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,989.60 : 385,009.44 = 151,667.92 : x
  2. Step 2: Convert to fraction form
    278,989.60/385,009.44 = 151,667.92/x
  3. Step 3: Cross multiply
    278,989.60x = 385,009.44 × 151,667.92
  4. Step 4: Simplify right side
    278,989.60x = 58,393,580,945.16
  5. Step 5: Solve for x
    x = 58,393,580,945.16/278,989.60
  6. Step 6: Final answer
    x = 209,303.79

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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.