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Finding the Fourth Proportional to 761.86, 1,141.87 and 299.35

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Solution

The fourth proportional to 761.86, 1,141.87 and 299.35 is: 448.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.86 : 1,141.87 = 299.35 : x
  2. Step 2: Convert to fraction form
    761.86/1,141.87 = 299.35/x
  3. Step 3: Cross multiply
    761.86x = 1,141.87 × 299.35
  4. Step 4: Simplify right side
    761.86x = 341,818.78
  5. Step 5: Solve for x
    x = 341,818.78/761.86
  6. Step 6: Final answer
    x = 448.66

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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.