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Finding the Fourth Proportional to 701.90, 968.58 and 407.20

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Solution

The fourth proportional to 701.90, 968.58 and 407.20 is: 561.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.90 : 968.58 = 407.20 : x
  2. Step 2: Convert to fraction form
    701.90/968.58 = 407.20/x
  3. Step 3: Cross multiply
    701.90x = 968.58 × 407.20
  4. Step 4: Simplify right side
    701.90x = 394,405.78
  5. Step 5: Solve for x
    x = 394,405.78/701.90
  6. Step 6: Final answer
    x = 561.91

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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.