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Finding the Fourth Proportional to 576.48, 795.12 and 389.88

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Solution

The fourth proportional to 576.48, 795.12 and 389.88 is: 537.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.48 : 795.12 = 389.88 : x
  2. Step 2: Convert to fraction form
    576.48/795.12 = 389.88/x
  3. Step 3: Cross multiply
    576.48x = 795.12 × 389.88
  4. Step 4: Simplify right side
    576.48x = 310,001.39
  5. Step 5: Solve for x
    x = 310,001.39/576.48
  6. Step 6: Final answer
    x = 537.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.