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Finding the Fourth Proportional to 428,718.89, 591,655.69 and 237,728.18

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Solution

The fourth proportional to 428,718.89, 591,655.69 and 237,728.18 is: 328,077.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,718.89 : 591,655.69 = 237,728.18 : x
  2. Step 2: Convert to fraction form
    428,718.89/591,655.69 = 237,728.18/x
  3. Step 3: Cross multiply
    428,718.89x = 591,655.69 × 237,728.18
  4. Step 4: Simplify right side
    428,718.89x = 140,653,232,146.64
  5. Step 5: Solve for x
    x = 140,653,232,146.64/428,718.89
  6. Step 6: Final answer
    x = 328,077.99

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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.