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Finding the Fourth Proportional to 390.46, 581.51 and 363.73

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Solution

The fourth proportional to 390.46, 581.51 and 363.73 is: 541.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.46 : 581.51 = 363.73 : x
  2. Step 2: Convert to fraction form
    390.46/581.51 = 363.73/x
  3. Step 3: Cross multiply
    390.46x = 581.51 × 363.73
  4. Step 4: Simplify right side
    390.46x = 211,512.63
  5. Step 5: Solve for x
    x = 211,512.63/390.46
  6. Step 6: Final answer
    x = 541.70

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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.