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Finding the Fourth Proportional to 643,560.52, 888,113.52 and 357,082.66

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Solution

The fourth proportional to 643,560.52, 888,113.52 and 357,082.66 is: 492,774.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,560.52 : 888,113.52 = 357,082.66 : x
  2. Step 2: Convert to fraction form
    643,560.52/888,113.52 = 357,082.66/x
  3. Step 3: Cross multiply
    643,560.52x = 888,113.52 × 357,082.66
  4. Step 4: Simplify right side
    643,560.52x = 317,129,938,103.56
  5. Step 5: Solve for x
    x = 317,129,938,103.56/643,560.52
  6. Step 6: Final answer
    x = 492,774.07

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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.