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Finding the Fourth Proportional to 510.42, 704.49 and 300.69

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Solution

The fourth proportional to 510.42, 704.49 and 300.69 is: 415.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.42 : 704.49 = 300.69 : x
  2. Step 2: Convert to fraction form
    510.42/704.49 = 300.69/x
  3. Step 3: Cross multiply
    510.42x = 704.49 × 300.69
  4. Step 4: Simplify right side
    510.42x = 211,833.10
  5. Step 5: Solve for x
    x = 211,833.10/510.42
  6. Step 6: Final answer
    x = 415.02

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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.