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Finding the Fourth Proportional to 428,120.25, 590,805.95 and 237,145.95

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Solution

The fourth proportional to 428,120.25, 590,805.95 and 237,145.95 is: 327,261.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,120.25 : 590,805.95 = 237,145.95 : x
  2. Step 2: Convert to fraction form
    428,120.25/590,805.95 = 237,145.95/x
  3. Step 3: Cross multiply
    428,120.25x = 590,805.95 × 237,145.95
  4. Step 4: Simplify right side
    428,120.25x = 140,107,237,092.67
  5. Step 5: Solve for x
    x = 140,107,237,092.67/428,120.25
  6. Step 6: Final answer
    x = 327,261.41

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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.