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Finding the Fourth Proportional to 914.91, 1,262.76 and 620.27

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Solution

The fourth proportional to 914.91, 1,262.76 and 620.27 is: 856.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.91 : 1,262.76 = 620.27 : x
  2. Step 2: Convert to fraction form
    914.91/1,262.76 = 620.27/x
  3. Step 3: Cross multiply
    914.91x = 1,262.76 × 620.27
  4. Step 4: Simplify right side
    914.91x = 783,260.58
  5. Step 5: Solve for x
    x = 783,260.58/914.91
  6. Step 6: Final answer
    x = 856.10

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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.