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Finding the Fourth Proportional to 472, 706.74 and 380.20

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Solution

The fourth proportional to 472, 706.74 and 380.20 is: 569.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    472 : 706.74 = 380.20 : x
  2. Step 2: Convert to fraction form
    472/706.74 = 380.20/x
  3. Step 3: Cross multiply
    472x = 706.74 × 380.20
  4. Step 4: Simplify right side
    472x = 268,702.55
  5. Step 5: Solve for x
    x = 268,702.55/472
  6. Step 6: Final answer
    x = 569.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.