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Finding the Fourth Proportional to 640.09, 955.80 and 508.62

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Solution

The fourth proportional to 640.09, 955.80 and 508.62 is: 759.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.09 : 955.80 = 508.62 : x
  2. Step 2: Convert to fraction form
    640.09/955.80 = 508.62/x
  3. Step 3: Cross multiply
    640.09x = 955.80 × 508.62
  4. Step 4: Simplify right side
    640.09x = 486,139.00
  5. Step 5: Solve for x
    x = 486,139.00/640.09
  6. Step 6: Final answer
    x = 759.49

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.