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Finding the Fourth Proportional to 1,089.07, 1,633.59 and 319.57

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Solution

The fourth proportional to 1,089.07, 1,633.59 and 319.57 is: 479.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.07 : 1,633.59 = 319.57 : x
  2. Step 2: Convert to fraction form
    1,089.07/1,633.59 = 319.57/x
  3. Step 3: Cross multiply
    1,089.07x = 1,633.59 × 319.57
  4. Step 4: Simplify right side
    1,089.07x = 522,046.36
  5. Step 5: Solve for x
    x = 522,046.36/1,089.07
  6. Step 6: Final answer
    x = 479.35

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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.