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Finding the Fourth Proportional to 859.38, 1,185.92 and 510

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Solution

The fourth proportional to 859.38, 1,185.92 and 510 is: 703.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    859.38 : 1,185.92 = 510 : x
  2. Step 2: Convert to fraction form
    859.38/1,185.92 = 510/x
  3. Step 3: Cross multiply
    859.38x = 1,185.92 × 510
  4. Step 4: Simplify right side
    859.38x = 604,819.20
  5. Step 5: Solve for x
    x = 604,819.20/859.38
  6. Step 6: Final answer
    x = 703.79

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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.