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Finding the Fourth Proportional to 644,786.48, 889,778.40 and 358,304

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Solution

The fourth proportional to 644,786.48, 889,778.40 and 358,304 is: 494,444.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,786.48 : 889,778.40 = 358,304 : x
  2. Step 2: Convert to fraction form
    644,786.48/889,778.40 = 358,304/x
  3. Step 3: Cross multiply
    644,786.48x = 889,778.40 × 358,304
  4. Step 4: Simplify right side
    644,786.48x = 318,811,159,833.60
  5. Step 5: Solve for x
    x = 318,811,159,833.60/644,786.48
  6. Step 6: Final answer
    x = 494,444.55

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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.