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Finding the Fourth Proportional to 522, 720.42 and 347.76

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Solution

The fourth proportional to 522, 720.42 and 347.76 is: 479.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    522 : 720.42 = 347.76 : x
  2. Step 2: Convert to fraction form
    522/720.42 = 347.76/x
  3. Step 3: Cross multiply
    522x = 720.42 × 347.76
  4. Step 4: Simplify right side
    522x = 250,533.26
  5. Step 5: Solve for x
    x = 250,533.26/522
  6. Step 6: Final answer
    x = 479.95

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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.