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Finding the Fourth Proportional to 1,155.88, 1,733.69 and 290.19

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Solution

The fourth proportional to 1,155.88, 1,733.69 and 290.19 is: 435.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,155.88 : 1,733.69 = 290.19 : x
  2. Step 2: Convert to fraction form
    1,155.88/1,733.69 = 290.19/x
  3. Step 3: Cross multiply
    1,155.88x = 1,733.69 × 290.19
  4. Step 4: Simplify right side
    1,155.88x = 503,098.05
  5. Step 5: Solve for x
    x = 503,098.05/1,155.88
  6. Step 6: Final answer
    x = 435.25

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Double scale
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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.