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Finding the Fourth Proportional to 1,105.73, 1,525.93 and 608.40

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Solution

The fourth proportional to 1,105.73, 1,525.93 and 608.40 is: 839.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,105.73 : 1,525.93 = 608.40 : x
  2. Step 2: Convert to fraction form
    1,105.73/1,525.93 = 608.40/x
  3. Step 3: Cross multiply
    1,105.73x = 1,525.93 × 608.40
  4. Step 4: Simplify right side
    1,105.73x = 928,375.81
  5. Step 5: Solve for x
    x = 928,375.81/1,105.73
  6. Step 6: Final answer
    x = 839.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.