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Finding the Fourth Proportional to 576.94, 795.90 and 390.49

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Solution

The fourth proportional to 576.94, 795.90 and 390.49 is: 538.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.94 : 795.90 = 390.49 : x
  2. Step 2: Convert to fraction form
    576.94/795.90 = 390.49/x
  3. Step 3: Cross multiply
    576.94x = 795.90 × 390.49
  4. Step 4: Simplify right side
    576.94x = 310,790.99
  5. Step 5: Solve for x
    x = 310,790.99/576.94
  6. Step 6: Final answer
    x = 538.69

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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.