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Finding the Fourth Proportional to 959.91, 1,323.70 and 904.11

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Solution

The fourth proportional to 959.91, 1,323.70 and 904.11 is: 1,246.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.91 : 1,323.70 = 904.11 : x
  2. Step 2: Convert to fraction form
    959.91/1,323.70 = 904.11/x
  3. Step 3: Cross multiply
    959.91x = 1,323.70 × 904.11
  4. Step 4: Simplify right side
    959.91x = 1,196,763.18
  5. Step 5: Solve for x
    x = 1,196,763.18/959.91
  6. Step 6: Final answer
    x = 1,246.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.