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Finding the Fourth Proportional to 508.64, 761.14 and 440.40

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Solution

The fourth proportional to 508.64, 761.14 and 440.40 is: 659.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.64 : 761.14 = 440.40 : x
  2. Step 2: Convert to fraction form
    508.64/761.14 = 440.40/x
  3. Step 3: Cross multiply
    508.64x = 761.14 × 440.40
  4. Step 4: Simplify right side
    508.64x = 335,203.05
  5. Step 5: Solve for x
    x = 335,203.05/508.64
  6. Step 6: Final answer
    x = 659.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.