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Finding the Fourth Proportional to 643,325.18, 887,771.61 and 371,383.88

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Solution

The fourth proportional to 643,325.18, 887,771.61 and 371,383.88 is: 512,499.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,325.18 : 887,771.61 = 371,383.88 : x
  2. Step 2: Convert to fraction form
    643,325.18/887,771.61 = 371,383.88/x
  3. Step 3: Cross multiply
    643,325.18x = 887,771.61 × 371,383.88
  4. Step 4: Simplify right side
    643,325.18x = 329,704,060,636.79
  5. Step 5: Solve for x
    x = 329,704,060,636.79/643,325.18
  6. Step 6: Final answer
    x = 512,499.86

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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.