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Finding the Fourth Proportional to 641.40, 959.70 and 583.80

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Solution

The fourth proportional to 641.40, 959.70 and 583.80 is: 873.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.40 : 959.70 = 583.80 : x
  2. Step 2: Convert to fraction form
    641.40/959.70 = 583.80/x
  3. Step 3: Cross multiply
    641.40x = 959.70 × 583.80
  4. Step 4: Simplify right side
    641.40x = 560,272.86
  5. Step 5: Solve for x
    x = 560,272.86/641.40
  6. Step 6: Final answer
    x = 873.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.