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Finding the Fourth Proportional to 643,196.46, 887,468.10 and 371,206.74

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Solution

The fourth proportional to 643,196.46, 887,468.10 and 371,206.74 is: 512,182.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,196.46 : 887,468.10 = 371,206.74 : x
  2. Step 2: Convert to fraction form
    643,196.46/887,468.10 = 371,206.74/x
  3. Step 3: Cross multiply
    643,196.46x = 887,468.10 × 371,206.74
  4. Step 4: Simplify right side
    643,196.46x = 329,434,140,254.99
  5. Step 5: Solve for x
    x = 329,434,140,254.99/643,196.46
  6. Step 6: Final answer
    x = 512,182.76

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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.