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Finding the Fourth Proportional to 772.83, 1,159.70 and 286.22

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Solution

The fourth proportional to 772.83, 1,159.70 and 286.22 is: 429.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.83 : 1,159.70 = 286.22 : x
  2. Step 2: Convert to fraction form
    772.83/1,159.70 = 286.22/x
  3. Step 3: Cross multiply
    772.83x = 1,159.70 × 286.22
  4. Step 4: Simplify right side
    772.83x = 331,929.33
  5. Step 5: Solve for x
    x = 331,929.33/772.83
  6. Step 6: Final answer
    x = 429.50

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Half scale
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Double scale
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Similar ratio
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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.