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Finding the Fourth Proportional to 428,419.48, 591,238.80 and 237,432.88

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Solution

The fourth proportional to 428,419.48, 591,238.80 and 237,432.88 is: 327,668.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,419.48 : 591,238.80 = 237,432.88 : x
  2. Step 2: Convert to fraction form
    428,419.48/591,238.80 = 237,432.88/x
  3. Step 3: Cross multiply
    428,419.48x = 591,238.80 × 237,432.88
  4. Step 4: Simplify right side
    428,419.48x = 140,379,531,051.74
  5. Step 5: Solve for x
    x = 140,379,531,051.74/428,419.48
  6. Step 6: Final answer
    x = 327,668.41

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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.