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Finding the Fourth Proportional to 428,390.78, 591,202.80 and 237,400.07

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Solution

The fourth proportional to 428,390.78, 591,202.80 and 237,400.07 is: 327,625.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,390.78 : 591,202.80 = 237,400.07 : x
  2. Step 2: Convert to fraction form
    428,390.78/591,202.80 = 237,400.07/x
  3. Step 3: Cross multiply
    428,390.78x = 591,202.80 × 237,400.07
  4. Step 4: Simplify right side
    428,390.78x = 140,351,583,148.18
  5. Step 5: Solve for x
    x = 140,351,583,148.18/428,390.78
  6. Step 6: Final answer
    x = 327,625.13

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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.