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Finding the Fourth Proportional to 520.76, 720.05 and 474.17

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Solution

The fourth proportional to 520.76, 720.05 and 474.17 is: 655.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.76 : 720.05 = 474.17 : x
  2. Step 2: Convert to fraction form
    520.76/720.05 = 474.17/x
  3. Step 3: Cross multiply
    520.76x = 720.05 × 474.17
  4. Step 4: Simplify right side
    520.76x = 341,420.14
  5. Step 5: Solve for x
    x = 341,420.14/520.76
  6. Step 6: Final answer
    x = 655.62

Related Problems

Find fourth proportional to 260.38, 360.02 and 237.08
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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.