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Finding the Fourth Proportional to 779.04, 1,167.78 and 490.68

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Solution

The fourth proportional to 779.04, 1,167.78 and 490.68 is: 735.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    779.04 : 1,167.78 = 490.68 : x
  2. Step 2: Convert to fraction form
    779.04/1,167.78 = 490.68/x
  3. Step 3: Cross multiply
    779.04x = 1,167.78 × 490.68
  4. Step 4: Simplify right side
    779.04x = 573,006.29
  5. Step 5: Solve for x
    x = 573,006.29/779.04
  6. Step 6: Final answer
    x = 735.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.