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Finding the Fourth Proportional to 1,085.58, 1,626.75 and 435.96

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Solution

The fourth proportional to 1,085.58, 1,626.75 and 435.96 is: 653.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,085.58 : 1,626.75 = 435.96 : x
  2. Step 2: Convert to fraction form
    1,085.58/1,626.75 = 435.96/x
  3. Step 3: Cross multiply
    1,085.58x = 1,626.75 × 435.96
  4. Step 4: Simplify right side
    1,085.58x = 709,197.93
  5. Step 5: Solve for x
    x = 709,197.93/1,085.58
  6. Step 6: Final answer
    x = 653.29

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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.