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Finding the Fourth Proportional to 640.60, 958.88 and 586.74

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Solution

The fourth proportional to 640.60, 958.88 and 586.74 is: 878.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.60 : 958.88 = 586.74 : x
  2. Step 2: Convert to fraction form
    640.60/958.88 = 586.74/x
  3. Step 3: Cross multiply
    640.60x = 958.88 × 586.74
  4. Step 4: Simplify right side
    640.60x = 562,613.25
  5. Step 5: Solve for x
    x = 562,613.25/640.60
  6. Step 6: Final answer
    x = 878.26

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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.