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Finding the Fourth Proportional to 426.08, 587.62 and 278.76

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Solution

The fourth proportional to 426.08, 587.62 and 278.76 is: 384.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.08 : 587.62 = 278.76 : x
  2. Step 2: Convert to fraction form
    426.08/587.62 = 278.76/x
  3. Step 3: Cross multiply
    426.08x = 587.62 × 278.76
  4. Step 4: Simplify right side
    426.08x = 163,804.95
  5. Step 5: Solve for x
    x = 163,804.95/426.08
  6. Step 6: Final answer
    x = 384.45

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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.