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Finding the Fourth Proportional to 403,335.80, 605,003.70 and 308,857.40

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Solution

The fourth proportional to 403,335.80, 605,003.70 and 308,857.40 is: 463,286.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,335.80 : 605,003.70 = 308,857.40 : x
  2. Step 2: Convert to fraction form
    403,335.80/605,003.70 = 308,857.40/x
  3. Step 3: Cross multiply
    403,335.80x = 605,003.70 × 308,857.40
  4. Step 4: Simplify right side
    403,335.80x = 186,859,869,772.38
  5. Step 5: Solve for x
    x = 186,859,869,772.38/403,335.80
  6. Step 6: Final answer
    x = 463,286.10

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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.