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Finding the Fourth Proportional to 644,146.90, 888,905.64 and 357,659.62

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Solution

The fourth proportional to 644,146.90, 888,905.64 and 357,659.62 is: 493,560.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,146.90 : 888,905.64 = 357,659.62 : x
  2. Step 2: Convert to fraction form
    644,146.90/888,905.64 = 357,659.62/x
  3. Step 3: Cross multiply
    644,146.90x = 888,905.64 × 357,659.62
  4. Step 4: Simplify right side
    644,146.90x = 317,925,653,418.26
  5. Step 5: Solve for x
    x = 317,925,653,418.26/644,146.90
  6. Step 6: Final answer
    x = 493,560.79

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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.