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Finding the Fourth Proportional to 702.49, 969.36 and 407.71

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Solution

The fourth proportional to 702.49, 969.36 and 407.71 is: 562.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.49 : 969.36 = 407.71 : x
  2. Step 2: Convert to fraction form
    702.49/969.36 = 407.71/x
  3. Step 3: Cross multiply
    702.49x = 969.36 × 407.71
  4. Step 4: Simplify right side
    702.49x = 395,217.77
  5. Step 5: Solve for x
    x = 395,217.77/702.49
  6. Step 6: Final answer
    x = 562.60

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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.