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Finding the Fourth Proportional to 1,059.19, 1,589.06 and 538.99

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Solution

The fourth proportional to 1,059.19, 1,589.06 and 538.99 is: 808.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,059.19 : 1,589.06 = 538.99 : x
  2. Step 2: Convert to fraction form
    1,059.19/1,589.06 = 538.99/x
  3. Step 3: Cross multiply
    1,059.19x = 1,589.06 × 538.99
  4. Step 4: Simplify right side
    1,059.19x = 856,487.45
  5. Step 5: Solve for x
    x = 856,487.45/1,059.19
  6. Step 6: Final answer
    x = 808.62

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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.