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Finding the Fourth Proportional to 576.31, 795.52 and 390.76

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Solution

The fourth proportional to 576.31, 795.52 and 390.76 is: 539.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.31 : 795.52 = 390.76 : x
  2. Step 2: Convert to fraction form
    576.31/795.52 = 390.76/x
  3. Step 3: Cross multiply
    576.31x = 795.52 × 390.76
  4. Step 4: Simplify right side
    576.31x = 310,854.22
  5. Step 5: Solve for x
    x = 310,854.22/576.31
  6. Step 6: Final answer
    x = 539.39

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1.5x scale

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.