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Finding the Fourth Proportional to 611,132.88, 843,372.36 and 339,218.28

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Solution

The fourth proportional to 611,132.88, 843,372.36 and 339,218.28 is: 468,126.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,132.88 : 843,372.36 = 339,218.28 : x
  2. Step 2: Convert to fraction form
    611,132.88/843,372.36 = 339,218.28/x
  3. Step 3: Cross multiply
    611,132.88x = 843,372.36 × 339,218.28
  4. Step 4: Simplify right side
    611,132.88x = 286,087,321,358.74
  5. Step 5: Solve for x
    x = 286,087,321,358.74/611,132.88
  6. Step 6: Final answer
    x = 468,126.21

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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.