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Finding the Fourth Proportional to 772.24, 1,157.58 and 386.68

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Solution

The fourth proportional to 772.24, 1,157.58 and 386.68 is: 579.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.24 : 1,157.58 = 386.68 : x
  2. Step 2: Convert to fraction form
    772.24/1,157.58 = 386.68/x
  3. Step 3: Cross multiply
    772.24x = 1,157.58 × 386.68
  4. Step 4: Simplify right side
    772.24x = 447,613.03
  5. Step 5: Solve for x
    x = 447,613.03/772.24
  6. Step 6: Final answer
    x = 579.63

Related Problems

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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.