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Finding the Fourth Proportional to 428,351.54, 591,128.64 and 237,368.12

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Solution

The fourth proportional to 428,351.54, 591,128.64 and 237,368.12 is: 327,569.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,351.54 : 591,128.64 = 237,368.12 : x
  2. Step 2: Convert to fraction form
    428,351.54/591,128.64 = 237,368.12/x
  3. Step 3: Cross multiply
    428,351.54x = 591,128.64 × 237,368.12
  4. Step 4: Simplify right side
    428,351.54x = 140,315,090,999.31
  5. Step 5: Solve for x
    x = 140,315,090,999.31/428,351.54
  6. Step 6: Final answer
    x = 327,569.95

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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.