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Finding the Fourth Proportional to 524.16, 721.80 and 512.80

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Solution

The fourth proportional to 524.16, 721.80 and 512.80 is: 706.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    524.16 : 721.80 = 512.80 : x
  2. Step 2: Convert to fraction form
    524.16/721.80 = 512.80/x
  3. Step 3: Cross multiply
    524.16x = 721.80 × 512.80
  4. Step 4: Simplify right side
    524.16x = 370,139.04
  5. Step 5: Solve for x
    x = 370,139.04/524.16
  6. Step 6: Final answer
    x = 706.16

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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.