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Finding the Fourth Proportional to 559.51, 836.23 and 515.74

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Solution

The fourth proportional to 559.51, 836.23 and 515.74 is: 770.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.51 : 836.23 = 515.74 : x
  2. Step 2: Convert to fraction form
    559.51/836.23 = 515.74/x
  3. Step 3: Cross multiply
    559.51x = 836.23 × 515.74
  4. Step 4: Simplify right side
    559.51x = 431,277.26
  5. Step 5: Solve for x
    x = 431,277.26/559.51
  6. Step 6: Final answer
    x = 770.81

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