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Finding the Fourth Proportional to 959.77, 1,316.70 and 913.29

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Solution

The fourth proportional to 959.77, 1,316.70 and 913.29 is: 1,252.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.77 : 1,316.70 = 913.29 : x
  2. Step 2: Convert to fraction form
    959.77/1,316.70 = 913.29/x
  3. Step 3: Cross multiply
    959.77x = 1,316.70 × 913.29
  4. Step 4: Simplify right side
    959.77x = 1,202,528.94
  5. Step 5: Solve for x
    x = 1,202,528.94/959.77
  6. Step 6: Final answer
    x = 1,252.93

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.