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Finding the Fourth Proportional to 576.90, 860.99 and 529.65

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Solution

The fourth proportional to 576.90, 860.99 and 529.65 is: 790.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.90 : 860.99 = 529.65 : x
  2. Step 2: Convert to fraction form
    576.90/860.99 = 529.65/x
  3. Step 3: Cross multiply
    576.90x = 860.99 × 529.65
  4. Step 4: Simplify right side
    576.90x = 456,020.71
  5. Step 5: Solve for x
    x = 456,020.71/576.90
  6. Step 6: Final answer
    x = 790.47

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.