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Finding the Fourth Proportional to 472.92, 711.44 and 290.40

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Solution

The fourth proportional to 472.92, 711.44 and 290.40 is: 436.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.92 : 711.44 = 290.40 : x
  2. Step 2: Convert to fraction form
    472.92/711.44 = 290.40/x
  3. Step 3: Cross multiply
    472.92x = 711.44 × 290.40
  4. Step 4: Simplify right side
    472.92x = 206,602.18
  5. Step 5: Solve for x
    x = 206,602.18/472.92
  6. Step 6: Final answer
    x = 436.86

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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.