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Finding the Fourth Proportional to 465.86, 643.07 and 416.66

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Solution

The fourth proportional to 465.86, 643.07 and 416.66 is: 575.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.86 : 643.07 = 416.66 : x
  2. Step 2: Convert to fraction form
    465.86/643.07 = 416.66/x
  3. Step 3: Cross multiply
    465.86x = 643.07 × 416.66
  4. Step 4: Simplify right side
    465.86x = 267,939.37
  5. Step 5: Solve for x
    x = 267,939.37/465.86
  6. Step 6: Final answer
    x = 575.15

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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.