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Finding the Fourth Proportional to 426.96, 585.31 and 420.24

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Solution

The fourth proportional to 426.96, 585.31 and 420.24 is: 576.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.96 : 585.31 = 420.24 : x
  2. Step 2: Convert to fraction form
    426.96/585.31 = 420.24/x
  3. Step 3: Cross multiply
    426.96x = 585.31 × 420.24
  4. Step 4: Simplify right side
    426.96x = 245,970.67
  5. Step 5: Solve for x
    x = 245,970.67/426.96
  6. Step 6: Final answer
    x = 576.10

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.