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Finding the Fourth Proportional to 643,329.30, 887,777.28 and 371,388

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Solution

The fourth proportional to 643,329.30, 887,777.28 and 371,388 is: 512,505.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,329.30 : 887,777.28 = 371,388 : x
  2. Step 2: Convert to fraction form
    643,329.30/887,777.28 = 371,388/x
  3. Step 3: Cross multiply
    643,329.30x = 887,777.28 × 371,388
  4. Step 4: Simplify right side
    643,329.30x = 329,709,828,464.64
  5. Step 5: Solve for x
    x = 329,709,828,464.64/643,329.30
  6. Step 6: Final answer
    x = 512,505.54

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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.