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Finding the Fourth Proportional to 643,333.30, 887,782.80 and 371,392

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Solution

The fourth proportional to 643,333.30, 887,782.80 and 371,392 is: 512,511.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,333.30 : 887,782.80 = 371,392 : x
  2. Step 2: Convert to fraction form
    643,333.30/887,782.80 = 371,392/x
  3. Step 3: Cross multiply
    643,333.30x = 887,782.80 × 371,392
  4. Step 4: Simplify right side
    643,333.30x = 329,715,429,657.60
  5. Step 5: Solve for x
    x = 329,715,429,657.60/643,333.30
  6. Step 6: Final answer
    x = 512,511.06

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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.