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Finding the Fourth Proportional to 644,051.91, 888,756.94 and 357,553.54

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Solution

The fourth proportional to 644,051.91, 888,756.94 and 357,553.54 is: 493,404.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,051.91 : 888,756.94 = 357,553.54 : x
  2. Step 2: Convert to fraction form
    644,051.91/888,756.94 = 357,553.54/x
  3. Step 3: Cross multiply
    644,051.91x = 888,756.94 × 357,553.54
  4. Step 4: Simplify right side
    644,051.91x = 317,778,191,654.46
  5. Step 5: Solve for x
    x = 317,778,191,654.46/644,051.91
  6. Step 6: Final answer
    x = 493,404.63

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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.