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Finding the Fourth Proportional to 389.52, 581.64 and 348.12

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Solution

The fourth proportional to 389.52, 581.64 and 348.12 is: 519.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.52 : 581.64 = 348.12 : x
  2. Step 2: Convert to fraction form
    389.52/581.64 = 348.12/x
  3. Step 3: Cross multiply
    389.52x = 581.64 × 348.12
  4. Step 4: Simplify right side
    389.52x = 202,480.52
  5. Step 5: Solve for x
    x = 202,480.52/389.52
  6. Step 6: Final answer
    x = 519.82

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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.