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Finding the Fourth Proportional to 570.03, 854.84 and 387.58

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Solution

The fourth proportional to 570.03, 854.84 and 387.58 is: 581.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.03 : 854.84 = 387.58 : x
  2. Step 2: Convert to fraction form
    570.03/854.84 = 387.58/x
  3. Step 3: Cross multiply
    570.03x = 854.84 × 387.58
  4. Step 4: Simplify right side
    570.03x = 331,318.89
  5. Step 5: Solve for x
    x = 331,318.89/570.03
  6. Step 6: Final answer
    x = 581.23

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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.