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Finding the Fourth Proportional to 586.90, 809.80 and 324.87

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Solution

The fourth proportional to 586.90, 809.80 and 324.87 is: 448.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.90 : 809.80 = 324.87 : x
  2. Step 2: Convert to fraction form
    586.90/809.80 = 324.87/x
  3. Step 3: Cross multiply
    586.90x = 809.80 × 324.87
  4. Step 4: Simplify right side
    586.90x = 263,079.73
  5. Step 5: Solve for x
    x = 263,079.73/586.90
  6. Step 6: Final answer
    x = 448.25

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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.