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Finding the Fourth Proportional to 521.51, 719.68 and 300.46

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Solution

The fourth proportional to 521.51, 719.68 and 300.46 is: 414.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.51 : 719.68 = 300.46 : x
  2. Step 2: Convert to fraction form
    521.51/719.68 = 300.46/x
  3. Step 3: Cross multiply
    521.51x = 719.68 × 300.46
  4. Step 4: Simplify right side
    521.51x = 216,235.05
  5. Step 5: Solve for x
    x = 216,235.05/521.51
  6. Step 6: Final answer
    x = 414.63

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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.