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Finding the Fourth Proportional to 285.05, 392.42 and 248.18

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Solution

The fourth proportional to 285.05, 392.42 and 248.18 is: 341.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.05 : 392.42 = 248.18 : x
  2. Step 2: Convert to fraction form
    285.05/392.42 = 248.18/x
  3. Step 3: Cross multiply
    285.05x = 392.42 × 248.18
  4. Step 4: Simplify right side
    285.05x = 97,389.45
  5. Step 5: Solve for x
    x = 97,389.45/285.05
  6. Step 6: Final answer
    x = 341.65

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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.