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Finding the Fourth Proportional to 426.30, 587.76 and 356.46

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Solution

The fourth proportional to 426.30, 587.76 and 356.46 is: 491.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.30 : 587.76 = 356.46 : x
  2. Step 2: Convert to fraction form
    426.30/587.76 = 356.46/x
  3. Step 3: Cross multiply
    426.30x = 587.76 × 356.46
  4. Step 4: Simplify right side
    426.30x = 209,512.93
  5. Step 5: Solve for x
    x = 209,512.93/426.30
  6. Step 6: Final answer
    x = 491.47

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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.