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Finding the Fourth Proportional to 445.60, 663.95 and 397.10

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Solution

The fourth proportional to 445.60, 663.95 and 397.10 is: 591.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.60 : 663.95 = 397.10 : x
  2. Step 2: Convert to fraction form
    445.60/663.95 = 397.10/x
  3. Step 3: Cross multiply
    445.60x = 663.95 × 397.10
  4. Step 4: Simplify right side
    445.60x = 263,655.04
  5. Step 5: Solve for x
    x = 263,655.04/445.60
  6. Step 6: Final answer
    x = 591.69

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.