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Finding the Fourth Proportional to 761.45, 1,050.77 and 429.91

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Solution

The fourth proportional to 761.45, 1,050.77 and 429.91 is: 593.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.45 : 1,050.77 = 429.91 : x
  2. Step 2: Convert to fraction form
    761.45/1,050.77 = 429.91/x
  3. Step 3: Cross multiply
    761.45x = 1,050.77 × 429.91
  4. Step 4: Simplify right side
    761.45x = 451,729.13
  5. Step 5: Solve for x
    x = 451,729.13/761.45
  6. Step 6: Final answer
    x = 593.25

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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.