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Finding the Fourth Proportional to 303,356.10, 454,990.95 and 103,685.70

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Solution

The fourth proportional to 303,356.10, 454,990.95 and 103,685.70 is: 155,513.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,356.10 : 454,990.95 = 103,685.70 : x
  2. Step 2: Convert to fraction form
    303,356.10/454,990.95 = 103,685.70/x
  3. Step 3: Cross multiply
    303,356.10x = 454,990.95 × 103,685.70
  4. Step 4: Simplify right side
    303,356.10x = 47,176,055,144.42
  5. Step 5: Solve for x
    x = 47,176,055,144.42/303,356.10
  6. Step 6: Final answer
    x = 155,513.78

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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.