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Finding the Fourth Proportional to 522.51, 721.47 and 375.49

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Solution

The fourth proportional to 522.51, 721.47 and 375.49 is: 518.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.51 : 721.47 = 375.49 : x
  2. Step 2: Convert to fraction form
    522.51/721.47 = 375.49/x
  3. Step 3: Cross multiply
    522.51x = 721.47 × 375.49
  4. Step 4: Simplify right side
    522.51x = 270,904.77
  5. Step 5: Solve for x
    x = 270,904.77/522.51
  6. Step 6: Final answer
    x = 518.47

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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.