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Finding the Fourth Proportional to 1,059.88, 1,589.93 and 290.38

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Solution

The fourth proportional to 1,059.88, 1,589.93 and 290.38 is: 435.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,059.88 : 1,589.93 = 290.38 : x
  2. Step 2: Convert to fraction form
    1,059.88/1,589.93 = 290.38/x
  3. Step 3: Cross multiply
    1,059.88x = 1,589.93 × 290.38
  4. Step 4: Simplify right side
    1,059.88x = 461,674.47
  5. Step 5: Solve for x
    x = 461,674.47/1,059.88
  6. Step 6: Final answer
    x = 435.59

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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.