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Finding the Fourth Proportional to 506.22, 699.05 and 478.94

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Solution

The fourth proportional to 506.22, 699.05 and 478.94 is: 661.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    506.22 : 699.05 = 478.94 : x
  2. Step 2: Convert to fraction form
    506.22/699.05 = 478.94/x
  3. Step 3: Cross multiply
    506.22x = 699.05 × 478.94
  4. Step 4: Simplify right side
    506.22x = 334,803.01
  5. Step 5: Solve for x
    x = 334,803.01/506.22
  6. Step 6: Final answer
    x = 661.38

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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.