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Finding the Fourth Proportional to 421,908.93, 582,211.95 and 230,885.40

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Solution

The fourth proportional to 421,908.93, 582,211.95 and 230,885.40 is: 318,609.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,908.93 : 582,211.95 = 230,885.40 : x
  2. Step 2: Convert to fraction form
    421,908.93/582,211.95 = 230,885.40/x
  3. Step 3: Cross multiply
    421,908.93x = 582,211.95 × 230,885.40
  4. Step 4: Simplify right side
    421,908.93x = 134,424,238,960.53
  5. Step 5: Solve for x
    x = 134,424,238,960.53/421,908.93
  6. Step 6: Final answer
    x = 318,609.61

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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.