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Finding the Fourth Proportional to 428,251.25, 591,153.59 and 247,118.45

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Solution

The fourth proportional to 428,251.25, 591,153.59 and 247,118.45 is: 341,119.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,251.25 : 591,153.59 = 247,118.45 : x
  2. Step 2: Convert to fraction form
    428,251.25/591,153.59 = 247,118.45/x
  3. Step 3: Cross multiply
    428,251.25x = 591,153.59 × 247,118.45
  4. Step 4: Simplify right side
    428,251.25x = 146,084,956,534.76
  5. Step 5: Solve for x
    x = 146,084,956,534.76/428,251.25
  6. Step 6: Final answer
    x = 341,119.74

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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.