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Finding the Fourth Proportional to 570.73, 857 and 478.08

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Solution

The fourth proportional to 570.73, 857 and 478.08 is: 717.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.73 : 857 = 478.08 : x
  2. Step 2: Convert to fraction form
    570.73/857 = 478.08/x
  3. Step 3: Cross multiply
    570.73x = 857 × 478.08
  4. Step 4: Simplify right side
    570.73x = 409,714.56
  5. Step 5: Solve for x
    x = 409,714.56/570.73
  6. Step 6: Final answer
    x = 717.88

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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.