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Finding the Fourth Proportional to 428,870.40, 591,860.52 and 237,883.79

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Solution

The fourth proportional to 428,870.40, 591,860.52 and 237,883.79 is: 328,290.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,870.40 : 591,860.52 = 237,883.79 : x
  2. Step 2: Convert to fraction form
    428,870.40/591,860.52 = 237,883.79/x
  3. Step 3: Cross multiply
    428,870.40x = 591,860.52 × 237,883.79
  4. Step 4: Simplify right side
    428,870.40x = 140,794,021,799.41
  5. Step 5: Solve for x
    x = 140,794,021,799.41/428,870.40
  6. Step 6: Final answer
    x = 328,290.37

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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.