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Finding the Fourth Proportional to 1,489.51, 2,234.63 and 515.62

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Solution

The fourth proportional to 1,489.51, 2,234.63 and 515.62 is: 773.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,489.51 : 2,234.63 = 515.62 : x
  2. Step 2: Convert to fraction form
    1,489.51/2,234.63 = 515.62/x
  3. Step 3: Cross multiply
    1,489.51x = 2,234.63 × 515.62
  4. Step 4: Simplify right side
    1,489.51x = 1,152,211.76
  5. Step 5: Solve for x
    x = 1,152,211.76/1,489.51
  6. Step 6: Final answer
    x = 773.55

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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.