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Finding the Fourth Proportional to 428,422.81, 591,223.48 and 237,464.91

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Solution

The fourth proportional to 428,422.81, 591,223.48 and 237,464.91 is: 327,701.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,422.81 : 591,223.48 = 237,464.91 : x
  2. Step 2: Convert to fraction form
    428,422.81/591,223.48 = 237,464.91/x
  3. Step 3: Cross multiply
    428,422.81x = 591,223.48 × 237,464.91
  4. Step 4: Simplify right side
    428,422.81x = 140,394,830,468.09
  5. Step 5: Solve for x
    x = 140,394,830,468.09/428,422.81
  6. Step 6: Final answer
    x = 327,701.58

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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.