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Finding the Fourth Proportional to 354,990.59, 489,868.72 and 193,814.56

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Solution

The fourth proportional to 354,990.59, 489,868.72 and 193,814.56 is: 267,454.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,990.59 : 489,868.72 = 193,814.56 : x
  2. Step 2: Convert to fraction form
    354,990.59/489,868.72 = 193,814.56/x
  3. Step 3: Cross multiply
    354,990.59x = 489,868.72 × 193,814.56
  4. Step 4: Simplify right side
    354,990.59x = 94,943,690,424.56
  5. Step 5: Solve for x
    x = 94,943,690,424.56/354,990.59
  6. Step 6: Final answer
    x = 267,454.10

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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.