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Finding the Fourth Proportional to 521.51, 719.66 and 300.49

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Solution

The fourth proportional to 521.51, 719.66 and 300.49 is: 414.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.51 : 719.66 = 300.49 : x
  2. Step 2: Convert to fraction form
    521.51/719.66 = 300.49/x
  3. Step 3: Cross multiply
    521.51x = 719.66 × 300.49
  4. Step 4: Simplify right side
    521.51x = 216,249.59
  5. Step 5: Solve for x
    x = 216,249.59/521.51
  6. Step 6: Final answer
    x = 414.66

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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.