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Finding the Fourth Proportional to 428,997.45, 592,008.61 and 238,006.74

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Solution

The fourth proportional to 428,997.45, 592,008.61 and 238,006.74 is: 328,444.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,997.45 : 592,008.61 = 238,006.74 : x
  2. Step 2: Convert to fraction form
    428,997.45/592,008.61 = 238,006.74/x
  3. Step 3: Cross multiply
    428,997.45x = 592,008.61 × 238,006.74
  4. Step 4: Simplify right side
    428,997.45x = 140,902,039,318.03
  5. Step 5: Solve for x
    x = 140,902,039,318.03/428,997.45
  6. Step 6: Final answer
    x = 328,444.93

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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.