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Finding the Fourth Proportional to 428,359.32, 591,120.99 and 237,390.48

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Solution

The fourth proportional to 428,359.32, 591,120.99 and 237,390.48 is: 327,590.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,359.32 : 591,120.99 = 237,390.48 : x
  2. Step 2: Convert to fraction form
    428,359.32/591,120.99 = 237,390.48/x
  3. Step 3: Cross multiply
    428,359.32x = 591,120.99 × 237,390.48
  4. Step 4: Simplify right side
    428,359.32x = 140,326,495,554.18
  5. Step 5: Solve for x
    x = 140,326,495,554.18/428,359.32
  6. Step 6: Final answer
    x = 327,590.62

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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.