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Finding the Fourth Proportional to 576.80, 790.54 and 570.32

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Solution

The fourth proportional to 576.80, 790.54 and 570.32 is: 781.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.80 : 790.54 = 570.32 : x
  2. Step 2: Convert to fraction form
    576.80/790.54 = 570.32/x
  3. Step 3: Cross multiply
    576.80x = 790.54 × 570.32
  4. Step 4: Simplify right side
    576.80x = 450,860.77
  5. Step 5: Solve for x
    x = 450,860.77/576.80
  6. Step 6: Final answer
    x = 781.66

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.