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Finding the Fourth Proportional to 702.85, 970.11 and 408.10

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Solution

The fourth proportional to 702.85, 970.11 and 408.10 is: 563.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.85 : 970.11 = 408.10 : x
  2. Step 2: Convert to fraction form
    702.85/970.11 = 408.10/x
  3. Step 3: Cross multiply
    702.85x = 970.11 × 408.10
  4. Step 4: Simplify right side
    702.85x = 395,901.89
  5. Step 5: Solve for x
    x = 395,901.89/702.85
  6. Step 6: Final answer
    x = 563.28

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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.