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Finding the Fourth Proportional to 761.32, 1,050.62 and 425.21

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Solution

The fourth proportional to 761.32, 1,050.62 and 425.21 is: 586.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.32 : 1,050.62 = 425.21 : x
  2. Step 2: Convert to fraction form
    761.32/1,050.62 = 425.21/x
  3. Step 3: Cross multiply
    761.32x = 1,050.62 × 425.21
  4. Step 4: Simplify right side
    761.32x = 446,729.14
  5. Step 5: Solve for x
    x = 446,729.14/761.32
  6. Step 6: Final answer
    x = 586.78

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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.