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Finding the Fourth Proportional to 1,060.98, 1,590.66 and 512.61

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Solution

The fourth proportional to 1,060.98, 1,590.66 and 512.61 is: 768.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,060.98 : 1,590.66 = 512.61 : x
  2. Step 2: Convert to fraction form
    1,060.98/1,590.66 = 512.61/x
  3. Step 3: Cross multiply
    1,060.98x = 1,590.66 × 512.61
  4. Step 4: Simplify right side
    1,060.98x = 815,388.22
  5. Step 5: Solve for x
    x = 815,388.22/1,060.98
  6. Step 6: Final answer
    x = 768.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.