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Finding the Fourth Proportional to 384.46, 573.90 and 355.91

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Solution

The fourth proportional to 384.46, 573.90 and 355.91 is: 531.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.46 : 573.90 = 355.91 : x
  2. Step 2: Convert to fraction form
    384.46/573.90 = 355.91/x
  3. Step 3: Cross multiply
    384.46x = 573.90 × 355.91
  4. Step 4: Simplify right side
    384.46x = 204,256.75
  5. Step 5: Solve for x
    x = 204,256.75/384.46
  6. Step 6: Final answer
    x = 531.28

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.