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Finding the Fourth Proportional to 421,805.53, 582,091.68 and 230,818.94

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Solution

The fourth proportional to 421,805.53, 582,091.68 and 230,818.94 is: 318,530.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,805.53 : 582,091.68 = 230,818.94 : x
  2. Step 2: Convert to fraction form
    421,805.53/582,091.68 = 230,818.94/x
  3. Step 3: Cross multiply
    421,805.53x = 582,091.68 × 230,818.94
  4. Step 4: Simplify right side
    421,805.53x = 134,357,784,560.42
  5. Step 5: Solve for x
    x = 134,357,784,560.42/421,805.53
  6. Step 6: Final answer
    x = 318,530.16

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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.