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Finding the Fourth Proportional to 762.29, 1,143.51 and 207.00

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Solution

The fourth proportional to 762.29, 1,143.51 and 207.00 is: 310.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.29 : 1,143.51 = 207.00 : x
  2. Step 2: Convert to fraction form
    762.29/1,143.51 = 207.00/x
  3. Step 3: Cross multiply
    762.29x = 1,143.51 × 207.00
  4. Step 4: Simplify right side
    762.29x = 236,710.93
  5. Step 5: Solve for x
    x = 236,710.93/762.29
  6. Step 6: Final answer
    x = 310.53

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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.