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Finding the Fourth Proportional to 285.36, 392.76 and 263.76

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Solution

The fourth proportional to 285.36, 392.76 and 263.76 is: 363.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.36 : 392.76 = 263.76 : x
  2. Step 2: Convert to fraction form
    285.36/392.76 = 263.76/x
  3. Step 3: Cross multiply
    285.36x = 392.76 × 263.76
  4. Step 4: Simplify right side
    285.36x = 103,594.38
  5. Step 5: Solve for x
    x = 103,594.38/285.36
  6. Step 6: Final answer
    x = 363.03

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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.