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Finding the Fourth Proportional to 644,641.73, 889,599.17 and 358,155.66

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Solution

The fourth proportional to 644,641.73, 889,599.17 and 358,155.66 is: 494,251.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,641.73 : 889,599.17 = 358,155.66 : x
  2. Step 2: Convert to fraction form
    644,641.73/889,599.17 = 358,155.66/x
  3. Step 3: Cross multiply
    644,641.73x = 889,599.17 × 358,155.66
  4. Step 4: Simplify right side
    644,641.73x = 318,614,977,866.80
  5. Step 5: Solve for x
    x = 318,614,977,866.80/644,641.73
  6. Step 6: Final answer
    x = 494,251.25

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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.