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Finding the Fourth Proportional to 643,964.61, 888,626.63 and 357,462.15

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Solution

The fourth proportional to 643,964.61, 888,626.63 and 357,462.15 is: 493,273.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,964.61 : 888,626.63 = 357,462.15 : x
  2. Step 2: Convert to fraction form
    643,964.61/888,626.63 = 357,462.15/x
  3. Step 3: Cross multiply
    643,964.61x = 888,626.63 × 357,462.15
  4. Step 4: Simplify right side
    643,964.61x = 317,650,383,268.36
  5. Step 5: Solve for x
    x = 317,650,383,268.36/643,964.61
  6. Step 6: Final answer
    x = 493,273.04

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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.