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Finding the Fourth Proportional to 949.16, 1,309.76 and 556.18

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Solution

The fourth proportional to 949.16, 1,309.76 and 556.18 is: 767.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.16 : 1,309.76 = 556.18 : x
  2. Step 2: Convert to fraction form
    949.16/1,309.76 = 556.18/x
  3. Step 3: Cross multiply
    949.16x = 1,309.76 × 556.18
  4. Step 4: Simplify right side
    949.16x = 728,462.32
  5. Step 5: Solve for x
    x = 728,462.32/949.16
  6. Step 6: Final answer
    x = 767.48

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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.