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Finding the Fourth Proportional to 643,593.29, 888,178.75 and 357,140.03

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Solution

The fourth proportional to 643,593.29, 888,178.75 and 357,140.03 is: 492,864.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,593.29 : 888,178.75 = 357,140.03 : x
  2. Step 2: Convert to fraction form
    643,593.29/888,178.75 = 357,140.03/x
  3. Step 3: Cross multiply
    643,593.29x = 888,178.75 × 357,140.03
  4. Step 4: Simplify right side
    643,593.29x = 317,204,185,420.36
  5. Step 5: Solve for x
    x = 317,204,185,420.36/643,593.29
  6. Step 6: Final answer
    x = 492,864.35

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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.