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Finding the Fourth Proportional to 644,778.15, 889,753.03 and 358,281.15

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Solution

The fourth proportional to 644,778.15, 889,753.03 and 358,281.15 is: 494,405.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,778.15 : 889,753.03 = 358,281.15 : x
  2. Step 2: Convert to fraction form
    644,778.15/889,753.03 = 358,281.15/x
  3. Step 3: Cross multiply
    644,778.15x = 889,753.03 × 358,281.15
  4. Step 4: Simplify right side
    644,778.15x = 318,781,738,804.39
  5. Step 5: Solve for x
    x = 318,781,738,804.39/644,778.15
  6. Step 6: Final answer
    x = 494,405.31

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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.