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Finding the Fourth Proportional to 386,648.40, 579,972.60 and 246,680.40

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Solution

The fourth proportional to 386,648.40, 579,972.60 and 246,680.40 is: 370,020.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,648.40 : 579,972.60 = 246,680.40 : x
  2. Step 2: Convert to fraction form
    386,648.40/579,972.60 = 246,680.40/x
  3. Step 3: Cross multiply
    386,648.40x = 579,972.60 × 246,680.40
  4. Step 4: Simplify right side
    386,648.40x = 143,067,872,957.04
  5. Step 5: Solve for x
    x = 143,067,872,957.04/386,648.40
  6. Step 6: Final answer
    x = 370,020.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.