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Finding the Fourth Proportional to 643,323.18, 887,768.85 and 371,381.88

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Solution

The fourth proportional to 643,323.18, 887,768.85 and 371,381.88 is: 512,497.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,323.18 : 887,768.85 = 371,381.88 : x
  2. Step 2: Convert to fraction form
    643,323.18/887,768.85 = 371,381.88/x
  3. Step 3: Cross multiply
    643,323.18x = 887,768.85 × 371,381.88
  4. Step 4: Simplify right side
    643,323.18x = 329,701,264,518.44
  5. Step 5: Solve for x
    x = 329,701,264,518.44/643,323.18
  6. Step 6: Final answer
    x = 512,497.10

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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.