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Finding the Fourth Proportional to 263.35, 393.28 and 260.49

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Solution

The fourth proportional to 263.35, 393.28 and 260.49 is: 389.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.35 : 393.28 = 260.49 : x
  2. Step 2: Convert to fraction form
    263.35/393.28 = 260.49/x
  3. Step 3: Cross multiply
    263.35x = 393.28 × 260.49
  4. Step 4: Simplify right side
    263.35x = 102,445.96
  5. Step 5: Solve for x
    x = 102,445.96/263.35
  6. Step 6: Final answer
    x = 389.01

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.