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Finding the Fourth Proportional to 576.12, 795.68 and 390.48

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Solution

The fourth proportional to 576.12, 795.68 and 390.48 is: 539.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.12 : 795.68 = 390.48 : x
  2. Step 2: Convert to fraction form
    576.12/795.68 = 390.48/x
  3. Step 3: Cross multiply
    576.12x = 795.68 × 390.48
  4. Step 4: Simplify right side
    576.12x = 310,697.13
  5. Step 5: Solve for x
    x = 310,697.13/576.12
  6. Step 6: Final answer
    x = 539.29

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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.