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Finding the Fourth Proportional to 570.70, 854.70 and 387.10

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Solution

The fourth proportional to 570.70, 854.70 and 387.10 is: 579.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.70 : 854.70 = 387.10 : x
  2. Step 2: Convert to fraction form
    570.70/854.70 = 387.10/x
  3. Step 3: Cross multiply
    570.70x = 854.70 × 387.10
  4. Step 4: Simplify right side
    570.70x = 330,854.37
  5. Step 5: Solve for x
    x = 330,854.37/570.70
  6. Step 6: Final answer
    x = 579.73

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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.