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Finding the Fourth Proportional to 954.90, 1,317.66 and 556.56

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Solution

The fourth proportional to 954.90, 1,317.66 and 556.56 is: 767.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.90 : 1,317.66 = 556.56 : x
  2. Step 2: Convert to fraction form
    954.90/1,317.66 = 556.56/x
  3. Step 3: Cross multiply
    954.90x = 1,317.66 × 556.56
  4. Step 4: Simplify right side
    954.90x = 733,356.85
  5. Step 5: Solve for x
    x = 733,356.85/954.90
  6. Step 6: Final answer
    x = 767.99

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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.