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Finding the Fourth Proportional to 398,856.73, 551,139.10 and 303,197.35

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Solution

The fourth proportional to 398,856.73, 551,139.10 and 303,197.35 is: 418,957.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,856.73 : 551,139.10 = 303,197.35 : x
  2. Step 2: Convert to fraction form
    398,856.73/551,139.10 = 303,197.35/x
  3. Step 3: Cross multiply
    398,856.73x = 551,139.10 × 303,197.35
  4. Step 4: Simplify right side
    398,856.73x = 167,103,912,465.54
  5. Step 5: Solve for x
    x = 167,103,912,465.54/398,856.73
  6. Step 6: Final answer
    x = 418,957.24

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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.