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Finding the Fourth Proportional to 480.40, 663.59 and 431.19

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Solution

The fourth proportional to 480.40, 663.59 and 431.19 is: 595.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.40 : 663.59 = 431.19 : x
  2. Step 2: Convert to fraction form
    480.40/663.59 = 431.19/x
  3. Step 3: Cross multiply
    480.40x = 663.59 × 431.19
  4. Step 4: Simplify right side
    480.40x = 286,134.45
  5. Step 5: Solve for x
    x = 286,134.45/480.40
  6. Step 6: Final answer
    x = 595.62

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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.