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Finding the Fourth Proportional to 702.33, 969.21 and 407.63

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Solution

The fourth proportional to 702.33, 969.21 and 407.63 is: 562.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.33 : 969.21 = 407.63 : x
  2. Step 2: Convert to fraction form
    702.33/969.21 = 407.63/x
  3. Step 3: Cross multiply
    702.33x = 969.21 × 407.63
  4. Step 4: Simplify right side
    702.33x = 395,074.23
  5. Step 5: Solve for x
    x = 395,074.23/702.33
  6. Step 6: Final answer
    x = 562.52

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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.