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Finding the Fourth Proportional to 418,864.40, 627,605.40 and 356,656.40

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Solution

The fourth proportional to 418,864.40, 627,605.40 and 356,656.40 is: 534,396.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,864.40 : 627,605.40 = 356,656.40 : x
  2. Step 2: Convert to fraction form
    418,864.40/627,605.40 = 356,656.40/x
  3. Step 3: Cross multiply
    418,864.40x = 627,605.40 × 356,656.40
  4. Step 4: Simplify right side
    418,864.40x = 223,839,482,584.56
  5. Step 5: Solve for x
    x = 223,839,482,584.56/418,864.40
  6. Step 6: Final answer
    x = 534,396.05

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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.