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Finding the Fourth Proportional to 643,275.71, 887,720.97 and 356,797.85

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Solution

The fourth proportional to 643,275.71, 887,720.97 and 356,797.85 is: 492,381.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,275.71 : 887,720.97 = 356,797.85 : x
  2. Step 2: Convert to fraction form
    643,275.71/887,720.97 = 356,797.85/x
  3. Step 3: Cross multiply
    643,275.71x = 887,720.97 × 356,797.85
  4. Step 4: Simplify right side
    643,275.71x = 316,736,933,495.92
  5. Step 5: Solve for x
    x = 316,736,933,495.92/643,275.71
  6. Step 6: Final answer
    x = 492,381.30

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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.