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Finding the Fourth Proportional to 761.34, 1,050.85 and 446.65

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Solution

The fourth proportional to 761.34, 1,050.85 and 446.65 is: 616.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.34 : 1,050.85 = 446.65 : x
  2. Step 2: Convert to fraction form
    761.34/1,050.85 = 446.65/x
  3. Step 3: Cross multiply
    761.34x = 1,050.85 × 446.65
  4. Step 4: Simplify right side
    761.34x = 469,362.15
  5. Step 5: Solve for x
    x = 469,362.15/761.34
  6. Step 6: Final answer
    x = 616.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.