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Finding the Fourth Proportional to 954.73, 1,317.41 and 561.61

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Solution

The fourth proportional to 954.73, 1,317.41 and 561.61 is: 774.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.73 : 1,317.41 = 561.61 : x
  2. Step 2: Convert to fraction form
    954.73/1,317.41 = 561.61/x
  3. Step 3: Cross multiply
    954.73x = 1,317.41 × 561.61
  4. Step 4: Simplify right side
    954.73x = 739,867.82
  5. Step 5: Solve for x
    x = 739,867.82/954.73
  6. Step 6: Final answer
    x = 774.95

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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.