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Finding the Fourth Proportional to 397.69, 595.51 and 260.34

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Solution

The fourth proportional to 397.69, 595.51 and 260.34 is: 389.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.69 : 595.51 = 260.34 : x
  2. Step 2: Convert to fraction form
    397.69/595.51 = 260.34/x
  3. Step 3: Cross multiply
    397.69x = 595.51 × 260.34
  4. Step 4: Simplify right side
    397.69x = 155,035.07
  5. Step 5: Solve for x
    x = 155,035.07/397.69
  6. Step 6: Final answer
    x = 389.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.