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Finding the Fourth Proportional to 638.58, 955.88 and 584.74

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Solution

The fourth proportional to 638.58, 955.88 and 584.74 is: 875.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.58 : 955.88 = 584.74 : x
  2. Step 2: Convert to fraction form
    638.58/955.88 = 584.74/x
  3. Step 3: Cross multiply
    638.58x = 955.88 × 584.74
  4. Step 4: Simplify right side
    638.58x = 558,941.27
  5. Step 5: Solve for x
    x = 558,941.27/638.58
  6. Step 6: Final answer
    x = 875.29

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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.