Home / 428,748.58-643,122.87-148,112.74

Finding the Fourth Proportional to 428,748.58, 643,122.87 and 148,112.74

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Solution

The fourth proportional to 428,748.58, 643,122.87 and 148,112.74 is: 222,169.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,748.58 : 643,122.87 = 148,112.74 : x
  2. Step 2: Convert to fraction form
    428,748.58/643,122.87 = 148,112.74/x
  3. Step 3: Cross multiply
    428,748.58x = 643,122.87 × 148,112.74
  4. Step 4: Simplify right side
    428,748.58x = 95,254,690,432.36
  5. Step 5: Solve for x
    x = 95,254,690,432.36/428,748.58
  6. Step 6: Final answer
    x = 222,169.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.