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Finding the Fourth Proportional to 1,095.36, 1,642.94 and 355.06

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Solution

The fourth proportional to 1,095.36, 1,642.94 and 355.06 is: 532.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,095.36 : 1,642.94 = 355.06 : x
  2. Step 2: Convert to fraction form
    1,095.36/1,642.94 = 355.06/x
  3. Step 3: Cross multiply
    1,095.36x = 1,642.94 × 355.06
  4. Step 4: Simplify right side
    1,095.36x = 583,342.28
  5. Step 5: Solve for x
    x = 583,342.28/1,095.36
  6. Step 6: Final answer
    x = 532.56

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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.