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Finding the Fourth Proportional to 407.90, 563.04 and 325.59

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Solution

The fourth proportional to 407.90, 563.04 and 325.59 is: 449.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.90 : 563.04 = 325.59 : x
  2. Step 2: Convert to fraction form
    407.90/563.04 = 325.59/x
  3. Step 3: Cross multiply
    407.90x = 563.04 × 325.59
  4. Step 4: Simplify right side
    407.90x = 183,320.19
  5. Step 5: Solve for x
    x = 183,320.19/407.90
  6. Step 6: Final answer
    x = 449.43

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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.