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Finding the Fourth Proportional to 761.34, 1,050.61 and 429.83

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Solution

The fourth proportional to 761.34, 1,050.61 and 429.83 is: 593.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.34 : 1,050.61 = 429.83 : x
  2. Step 2: Convert to fraction form
    761.34/1,050.61 = 429.83/x
  3. Step 3: Cross multiply
    761.34x = 1,050.61 × 429.83
  4. Step 4: Simplify right side
    761.34x = 451,585.25
  5. Step 5: Solve for x
    x = 451,585.25/761.34
  6. Step 6: Final answer
    x = 593.15

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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.