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Finding the Fourth Proportional to 390.52, 581.45 and 366.76

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Solution

The fourth proportional to 390.52, 581.45 and 366.76 is: 546.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.52 : 581.45 = 366.76 : x
  2. Step 2: Convert to fraction form
    390.52/581.45 = 366.76/x
  3. Step 3: Cross multiply
    390.52x = 581.45 × 366.76
  4. Step 4: Simplify right side
    390.52x = 213,252.60
  5. Step 5: Solve for x
    x = 213,252.60/390.52
  6. Step 6: Final answer
    x = 546.07

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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.