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Finding the Fourth Proportional to 762.19, 1,143.29 and 185.07

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Solution

The fourth proportional to 762.19, 1,143.29 and 185.07 is: 277.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.19 : 1,143.29 = 185.07 : x
  2. Step 2: Convert to fraction form
    762.19/1,143.29 = 185.07/x
  3. Step 3: Cross multiply
    762.19x = 1,143.29 × 185.07
  4. Step 4: Simplify right side
    762.19x = 211,582.04
  5. Step 5: Solve for x
    x = 211,582.04/762.19
  6. Step 6: Final answer
    x = 277.60

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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.