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Finding the Fourth Proportional to 702.21, 969.24 and 407.42

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Solution

The fourth proportional to 702.21, 969.24 and 407.42 is: 562.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.21 : 969.24 = 407.42 : x
  2. Step 2: Convert to fraction form
    702.21/969.24 = 407.42/x
  3. Step 3: Cross multiply
    702.21x = 969.24 × 407.42
  4. Step 4: Simplify right side
    702.21x = 394,887.76
  5. Step 5: Solve for x
    x = 394,887.76/702.21
  6. Step 6: Final answer
    x = 562.35

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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.