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Finding the Fourth Proportional to 570.29, 855.43 and 440.48

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Solution

The fourth proportional to 570.29, 855.43 and 440.48 is: 660.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.29 : 855.43 = 440.48 : x
  2. Step 2: Convert to fraction form
    570.29/855.43 = 440.48/x
  3. Step 3: Cross multiply
    570.29x = 855.43 × 440.48
  4. Step 4: Simplify right side
    570.29x = 376,799.81
  5. Step 5: Solve for x
    x = 376,799.81/570.29
  6. Step 6: Final answer
    x = 660.72

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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.