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Finding the Fourth Proportional to 403,872.20, 605,808.30 and 401,107.40

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Solution

The fourth proportional to 403,872.20, 605,808.30 and 401,107.40 is: 601,661.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,872.20 : 605,808.30 = 401,107.40 : x
  2. Step 2: Convert to fraction form
    403,872.20/605,808.30 = 401,107.40/x
  3. Step 3: Cross multiply
    403,872.20x = 605,808.30 × 401,107.40
  4. Step 4: Simplify right side
    403,872.20x = 242,994,192,111.42
  5. Step 5: Solve for x
    x = 242,994,192,111.42/403,872.20
  6. Step 6: Final answer
    x = 601,661.10

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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.