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Finding the Fourth Proportional to 1,095.17, 1,642.59 and 445.95

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Solution

The fourth proportional to 1,095.17, 1,642.59 and 445.95 is: 668.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,095.17 : 1,642.59 = 445.95 : x
  2. Step 2: Convert to fraction form
    1,095.17/1,642.59 = 445.95/x
  3. Step 3: Cross multiply
    1,095.17x = 1,642.59 × 445.95
  4. Step 4: Simplify right side
    1,095.17x = 732,513.01
  5. Step 5: Solve for x
    x = 732,513.01/1,095.17
  6. Step 6: Final answer
    x = 668.86

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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.