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Finding the Fourth Proportional to 570.08, 857.28 and 479.36

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Solution

The fourth proportional to 570.08, 857.28 and 479.36 is: 720.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.08 : 857.28 = 479.36 : x
  2. Step 2: Convert to fraction form
    570.08/857.28 = 479.36/x
  3. Step 3: Cross multiply
    570.08x = 857.28 × 479.36
  4. Step 4: Simplify right side
    570.08x = 410,945.74
  5. Step 5: Solve for x
    x = 410,945.74/570.08
  6. Step 6: Final answer
    x = 720.86

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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.