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Finding the Fourth Proportional to 701.88, 968.80 and 407.28

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Solution

The fourth proportional to 701.88, 968.80 and 407.28 is: 562.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.88 : 968.80 = 407.28 : x
  2. Step 2: Convert to fraction form
    701.88/968.80 = 407.28/x
  3. Step 3: Cross multiply
    701.88x = 968.80 × 407.28
  4. Step 4: Simplify right side
    701.88x = 394,572.86
  5. Step 5: Solve for x
    x = 394,572.86/701.88
  6. Step 6: Final answer
    x = 562.17

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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.