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Finding the Fourth Proportional to 426.29, 587.72 and 278.87

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Solution

The fourth proportional to 426.29, 587.72 and 278.87 is: 384.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.29 : 587.72 = 278.87 : x
  2. Step 2: Convert to fraction form
    426.29/587.72 = 278.87/x
  3. Step 3: Cross multiply
    426.29x = 587.72 × 278.87
  4. Step 4: Simplify right side
    426.29x = 163,895.23
  5. Step 5: Solve for x
    x = 163,895.23/426.29
  6. Step 6: Final answer
    x = 384.47

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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.