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Finding the Fourth Proportional to 472.90, 653.23 and 394.47

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Solution

The fourth proportional to 472.90, 653.23 and 394.47 is: 544.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.90 : 653.23 = 394.47 : x
  2. Step 2: Convert to fraction form
    472.90/653.23 = 394.47/x
  3. Step 3: Cross multiply
    472.90x = 653.23 × 394.47
  4. Step 4: Simplify right side
    472.90x = 257,677.67
  5. Step 5: Solve for x
    x = 257,677.67/472.90
  6. Step 6: Final answer
    x = 544.89

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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.