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Finding the Fourth Proportional to 1,095.16, 1,639.21 and 574.43

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Solution

The fourth proportional to 1,095.16, 1,639.21 and 574.43 is: 859.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,095.16 : 1,639.21 = 574.43 : x
  2. Step 2: Convert to fraction form
    1,095.16/1,639.21 = 574.43/x
  3. Step 3: Cross multiply
    1,095.16x = 1,639.21 × 574.43
  4. Step 4: Simplify right side
    1,095.16x = 941,611.38
  5. Step 5: Solve for x
    x = 941,611.38/1,095.16
  6. Step 6: Final answer
    x = 859.80

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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.