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Finding the Fourth Proportional to 644,283.74, 889,087.21 and 357,822.29

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Solution

The fourth proportional to 644,283.74, 889,087.21 and 357,822.29 is: 493,781.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,283.74 : 889,087.21 = 357,822.29 : x
  2. Step 2: Convert to fraction form
    644,283.74/889,087.21 = 357,822.29/x
  3. Step 3: Cross multiply
    644,283.74x = 889,087.21 × 357,822.29
  4. Step 4: Simplify right side
    644,283.74x = 318,135,221,491.91
  5. Step 5: Solve for x
    x = 318,135,221,491.91/644,283.74
  6. Step 6: Final answer
    x = 493,781.24

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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.