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Finding the Fourth Proportional to 643,169.62, 887,551.72 and 356,716.36

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Solution

The fourth proportional to 643,169.62, 887,551.72 and 356,716.36 is: 492,256.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,169.62 : 887,551.72 = 356,716.36 : x
  2. Step 2: Convert to fraction form
    643,169.62/887,551.72 = 356,716.36/x
  3. Step 3: Cross multiply
    643,169.62x = 887,551.72 × 356,716.36
  4. Step 4: Simplify right side
    643,169.62x = 316,604,218,870.14
  5. Step 5: Solve for x
    x = 316,604,218,870.14/643,169.62
  6. Step 6: Final answer
    x = 492,256.18

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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.