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Finding the Fourth Proportional to 643,768.62, 888,359.31 and 357,288.90

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Solution

The fourth proportional to 643,768.62, 888,359.31 and 357,288.90 is: 493,035.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,768.62 : 888,359.31 = 357,288.90 : x
  2. Step 2: Convert to fraction form
    643,768.62/888,359.31 = 357,288.90/x
  3. Step 3: Cross multiply
    643,768.62x = 888,359.31 × 357,288.90
  4. Step 4: Simplify right side
    643,768.62x = 317,400,920,674.66
  5. Step 5: Solve for x
    x = 317,400,920,674.66/643,768.62
  6. Step 6: Final answer
    x = 493,035.71

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1.5x scale

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.