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Finding the Fourth Proportional to 501.02, 690.90 and 461.78

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Solution

The fourth proportional to 501.02, 690.90 and 461.78 is: 636.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.02 : 690.90 = 461.78 : x
  2. Step 2: Convert to fraction form
    501.02/690.90 = 461.78/x
  3. Step 3: Cross multiply
    501.02x = 690.90 × 461.78
  4. Step 4: Simplify right side
    501.02x = 319,043.80
  5. Step 5: Solve for x
    x = 319,043.80/501.02
  6. Step 6: Final answer
    x = 636.79

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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.