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Finding the Fourth Proportional to 632.65, 947.93 and 388.66

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Solution

The fourth proportional to 632.65, 947.93 and 388.66 is: 582.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.65 : 947.93 = 388.66 : x
  2. Step 2: Convert to fraction form
    632.65/947.93 = 388.66/x
  3. Step 3: Cross multiply
    632.65x = 947.93 × 388.66
  4. Step 4: Simplify right side
    632.65x = 368,415.79
  5. Step 5: Solve for x
    x = 368,415.79/632.65
  6. Step 6: Final answer
    x = 582.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.