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Finding the Fourth Proportional to 959.36, 1,440.39 and 491.17

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Solution

The fourth proportional to 959.36, 1,440.39 and 491.17 is: 737.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.36 : 1,440.39 = 491.17 : x
  2. Step 2: Convert to fraction form
    959.36/1,440.39 = 491.17/x
  3. Step 3: Cross multiply
    959.36x = 1,440.39 × 491.17
  4. Step 4: Simplify right side
    959.36x = 707,480.00
  5. Step 5: Solve for x
    x = 707,480.00/959.36
  6. Step 6: Final answer
    x = 737.45

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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.