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Finding the Fourth Proportional to 643,182.15, 887,645.88 and 356,794.50

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Solution

The fourth proportional to 643,182.15, 887,645.88 and 356,794.50 is: 492,406.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,182.15 : 887,645.88 = 356,794.50 : x
  2. Step 2: Convert to fraction form
    643,182.15/887,645.88 = 356,794.50/x
  3. Step 3: Cross multiply
    643,182.15x = 887,645.88 × 356,794.50
  4. Step 4: Simplify right side
    643,182.15x = 316,707,167,931.66
  5. Step 5: Solve for x
    x = 316,707,167,931.66/643,182.15
  6. Step 6: Final answer
    x = 492,406.65

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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.