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Finding the Fourth Proportional to 949.07, 1,309.68 and 556.35

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Solution

The fourth proportional to 949.07, 1,309.68 and 556.35 is: 767.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.07 : 1,309.68 = 556.35 : x
  2. Step 2: Convert to fraction form
    949.07/1,309.68 = 556.35/x
  3. Step 3: Cross multiply
    949.07x = 1,309.68 × 556.35
  4. Step 4: Simplify right side
    949.07x = 728,640.47
  5. Step 5: Solve for x
    x = 728,640.47/949.07
  6. Step 6: Final answer
    x = 767.75

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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.