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Finding the Fourth Proportional to 398,787.96, 550,307.92 and 237,639.40

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Solution

The fourth proportional to 398,787.96, 550,307.92 and 237,639.40 is: 327,930.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,787.96 : 550,307.92 = 237,639.40 : x
  2. Step 2: Convert to fraction form
    398,787.96/550,307.92 = 237,639.40/x
  3. Step 3: Cross multiply
    398,787.96x = 550,307.92 × 237,639.40
  4. Step 4: Simplify right side
    398,787.96x = 130,774,843,924.05
  5. Step 5: Solve for x
    x = 130,774,843,924.05/398,787.96
  6. Step 6: Final answer
    x = 327,930.77

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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.