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Finding the Fourth Proportional to 762.63, 1,143.58 and 351.65

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Solution

The fourth proportional to 762.63, 1,143.58 and 351.65 is: 527.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.63 : 1,143.58 = 351.65 : x
  2. Step 2: Convert to fraction form
    762.63/1,143.58 = 351.65/x
  3. Step 3: Cross multiply
    762.63x = 1,143.58 × 351.65
  4. Step 4: Simplify right side
    762.63x = 402,139.91
  5. Step 5: Solve for x
    x = 402,139.91/762.63
  6. Step 6: Final answer
    x = 527.31

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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.