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Finding the Fourth Proportional to 779.40, 1,168.28 and 259.27

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Solution

The fourth proportional to 779.40, 1,168.28 and 259.27 is: 388.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    779.40 : 1,168.28 = 259.27 : x
  2. Step 2: Convert to fraction form
    779.40/1,168.28 = 259.27/x
  3. Step 3: Cross multiply
    779.40x = 1,168.28 × 259.27
  4. Step 4: Simplify right side
    779.40x = 302,894.76
  5. Step 5: Solve for x
    x = 302,894.76/779.40
  6. Step 6: Final answer
    x = 388.62

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Double scale
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1.5x scale

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.