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Finding the Fourth Proportional to 913.74, 1,260.86 and 559.83

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Solution

The fourth proportional to 913.74, 1,260.86 and 559.83 is: 772.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    913.74 : 1,260.86 = 559.83 : x
  2. Step 2: Convert to fraction form
    913.74/1,260.86 = 559.83/x
  3. Step 3: Cross multiply
    913.74x = 1,260.86 × 559.83
  4. Step 4: Simplify right side
    913.74x = 705,867.25
  5. Step 5: Solve for x
    x = 705,867.25/913.74
  6. Step 6: Final answer
    x = 772.50

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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.