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Finding the Fourth Proportional to 397.17, 595.33 and 260.31

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Solution

The fourth proportional to 397.17, 595.33 and 260.31 is: 390.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.17 : 595.33 = 260.31 : x
  2. Step 2: Convert to fraction form
    397.17/595.33 = 260.31/x
  3. Step 3: Cross multiply
    397.17x = 595.33 × 260.31
  4. Step 4: Simplify right side
    397.17x = 154,970.35
  5. Step 5: Solve for x
    x = 154,970.35/397.17
  6. Step 6: Final answer
    x = 390.19

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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.