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Finding the Fourth Proportional to 636.35, 878.33 and 570.74

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Solution

The fourth proportional to 636.35, 878.33 and 570.74 is: 787.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.35 : 878.33 = 570.74 : x
  2. Step 2: Convert to fraction form
    636.35/878.33 = 570.74/x
  3. Step 3: Cross multiply
    636.35x = 878.33 × 570.74
  4. Step 4: Simplify right side
    636.35x = 501,298.06
  5. Step 5: Solve for x
    x = 501,298.06/636.35
  6. Step 6: Final answer
    x = 787.77

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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.