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Finding the Fourth Proportional to 576.90, 795.87 and 390.32

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Solution

The fourth proportional to 576.90, 795.87 and 390.32 is: 538.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.90 : 795.87 = 390.32 : x
  2. Step 2: Convert to fraction form
    576.90/795.87 = 390.32/x
  3. Step 3: Cross multiply
    576.90x = 795.87 × 390.32
  4. Step 4: Simplify right side
    576.90x = 310,643.98
  5. Step 5: Solve for x
    x = 310,643.98/576.90
  6. Step 6: Final answer
    x = 538.47

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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.