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Finding the Fourth Proportional to 643,595.78, 888,168.30 and 357,142.52

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Solution

The fourth proportional to 643,595.78, 888,168.30 and 357,142.52 is: 492,860.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,595.78 : 888,168.30 = 357,142.52 : x
  2. Step 2: Convert to fraction form
    643,595.78/888,168.30 = 357,142.52/x
  3. Step 3: Cross multiply
    643,595.78x = 888,168.30 × 357,142.52
  4. Step 4: Simplify right side
    643,595.78x = 317,202,664,846.12
  5. Step 5: Solve for x
    x = 317,202,664,846.12/643,595.78
  6. Step 6: Final answer
    x = 492,860.08

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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.