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Finding the Fourth Proportional to 522.43, 720.98 and 347.65

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Solution

The fourth proportional to 522.43, 720.98 and 347.65 is: 479.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.43 : 720.98 = 347.65 : x
  2. Step 2: Convert to fraction form
    522.43/720.98 = 347.65/x
  3. Step 3: Cross multiply
    522.43x = 720.98 × 347.65
  4. Step 4: Simplify right side
    522.43x = 250,646.46
  5. Step 5: Solve for x
    x = 250,646.46/522.43
  6. Step 6: Final answer
    x = 479.77

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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.