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Finding the Fourth Proportional to 522.66, 720.72 and 347.70

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Solution

The fourth proportional to 522.66, 720.72 and 347.70 is: 479.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.66 : 720.72 = 347.70 : x
  2. Step 2: Convert to fraction form
    522.66/720.72 = 347.70/x
  3. Step 3: Cross multiply
    522.66x = 720.72 × 347.70
  4. Step 4: Simplify right side
    522.66x = 250,594.34
  5. Step 5: Solve for x
    x = 250,594.34/522.66
  6. Step 6: Final answer
    x = 479.46

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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.