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Finding the Fourth Proportional to 641.13, 883.94 and 509.91

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Solution

The fourth proportional to 641.13, 883.94 and 509.91 is: 703.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.13 : 883.94 = 509.91 : x
  2. Step 2: Convert to fraction form
    641.13/883.94 = 509.91/x
  3. Step 3: Cross multiply
    641.13x = 883.94 × 509.91
  4. Step 4: Simplify right side
    641.13x = 450,729.85
  5. Step 5: Solve for x
    x = 450,729.85/641.13
  6. Step 6: Final answer
    x = 703.02

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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.