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Finding the Fourth Proportional to 428,885.20, 591,850.14 and 247,591

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Solution

The fourth proportional to 428,885.20, 591,850.14 and 247,591 is: 341,668.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,885.20 : 591,850.14 = 247,591 : x
  2. Step 2: Convert to fraction form
    428,885.20/591,850.14 = 247,591/x
  3. Step 3: Cross multiply
    428,885.20x = 591,850.14 × 247,591
  4. Step 4: Simplify right side
    428,885.20x = 146,536,768,012.74
  5. Step 5: Solve for x
    x = 146,536,768,012.74/428,885.20
  6. Step 6: Final answer
    x = 341,668.98

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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.