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Finding the Fourth Proportional to 643,468, 887,986.56 and 375,247.84

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Solution

The fourth proportional to 643,468, 887,986.56 and 375,247.84 is: 517,842.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,468 : 887,986.56 = 375,247.84 : x
  2. Step 2: Convert to fraction form
    643,468/887,986.56 = 375,247.84/x
  3. Step 3: Cross multiply
    643,468x = 887,986.56 × 375,247.84
  4. Step 4: Simplify right side
    643,468x = 333,215,038,589.03
  5. Step 5: Solve for x
    x = 333,215,038,589.03/643,468
  6. Step 6: Final answer
    x = 517,842.44

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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.