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Finding the Fourth Proportional to 585.42, 878.14 and 549.78

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Solution

The fourth proportional to 585.42, 878.14 and 549.78 is: 824.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.42 : 878.14 = 549.78 : x
  2. Step 2: Convert to fraction form
    585.42/878.14 = 549.78/x
  3. Step 3: Cross multiply
    585.42x = 878.14 × 549.78
  4. Step 4: Simplify right side
    585.42x = 482,783.81
  5. Step 5: Solve for x
    x = 482,783.81/585.42
  6. Step 6: Final answer
    x = 824.68

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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.