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Finding the Fourth Proportional to 570.21, 855.32 and 159.35

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Solution

The fourth proportional to 570.21, 855.32 and 159.35 is: 239.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.21 : 855.32 = 159.35 : x
  2. Step 2: Convert to fraction form
    570.21/855.32 = 159.35/x
  3. Step 3: Cross multiply
    570.21x = 855.32 × 159.35
  4. Step 4: Simplify right side
    570.21x = 136,299.71
  5. Step 5: Solve for x
    x = 136,299.71/570.21
  6. Step 6: Final answer
    x = 239.03

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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.