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Finding the Fourth Proportional to 644,148.90, 888,908.40 and 357,661.62

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Solution

The fourth proportional to 644,148.90, 888,908.40 and 357,661.62 is: 493,563.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,148.90 : 888,908.40 = 357,661.62 : x
  2. Step 2: Convert to fraction form
    644,148.90/888,908.40 = 357,661.62/x
  3. Step 3: Cross multiply
    644,148.90x = 888,908.40 × 357,661.62
  4. Step 4: Simplify right side
    644,148.90x = 317,928,418,375.61
  5. Step 5: Solve for x
    x = 317,928,418,375.61/644,148.90
  6. Step 6: Final answer
    x = 493,563.55

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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.