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Finding the Fourth Proportional to 1,059.51, 1,589.61 and 511.74

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Solution

The fourth proportional to 1,059.51, 1,589.61 and 511.74 is: 767.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,059.51 : 1,589.61 = 511.74 : x
  2. Step 2: Convert to fraction form
    1,059.51/1,589.61 = 511.74/x
  3. Step 3: Cross multiply
    1,059.51x = 1,589.61 × 511.74
  4. Step 4: Simplify right side
    1,059.51x = 813,467.02
  5. Step 5: Solve for x
    x = 813,467.02/1,059.51
  6. Step 6: Final answer
    x = 767.78

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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.