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Finding the Fourth Proportional to 772.02, 1,157.63 and 309.42

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Solution

The fourth proportional to 772.02, 1,157.63 and 309.42 is: 463.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.02 : 1,157.63 = 309.42 : x
  2. Step 2: Convert to fraction form
    772.02/1,157.63 = 309.42/x
  3. Step 3: Cross multiply
    772.02x = 1,157.63 × 309.42
  4. Step 4: Simplify right side
    772.02x = 358,192.33
  5. Step 5: Solve for x
    x = 358,192.33/772.02
  6. Step 6: Final answer
    x = 463.97

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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.