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Finding the Fourth Proportional to 428,690.31, 591,619.22 and 237,703.70

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Solution

The fourth proportional to 428,690.31, 591,619.22 and 237,703.70 is: 328,045.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,690.31 : 591,619.22 = 237,703.70 : x
  2. Step 2: Convert to fraction form
    428,690.31/591,619.22 = 237,703.70/x
  3. Step 3: Cross multiply
    428,690.31x = 591,619.22 × 237,703.70
  4. Step 4: Simplify right side
    428,690.31x = 140,630,074,917.55
  5. Step 5: Solve for x
    x = 140,630,074,917.55/428,690.31
  6. Step 6: Final answer
    x = 328,045.85

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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.