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Finding the Fourth Proportional to 520.70, 718.20 and 371.32

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Solution

The fourth proportional to 520.70, 718.20 and 371.32 is: 512.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.70 : 718.20 = 371.32 : x
  2. Step 2: Convert to fraction form
    520.70/718.20 = 371.32/x
  3. Step 3: Cross multiply
    520.70x = 718.20 × 371.32
  4. Step 4: Simplify right side
    520.70x = 266,680.23
  5. Step 5: Solve for x
    x = 266,680.23/520.70
  6. Step 6: Final answer
    x = 512.16

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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.