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Finding the Fourth Proportional to 570.61, 855.89 and 396.77

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Solution

The fourth proportional to 570.61, 855.89 and 396.77 is: 595.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.61 : 855.89 = 396.77 : x
  2. Step 2: Convert to fraction form
    570.61/855.89 = 396.77/x
  3. Step 3: Cross multiply
    570.61x = 855.89 × 396.77
  4. Step 4: Simplify right side
    570.61x = 339,588.19
  5. Step 5: Solve for x
    x = 339,588.19/570.61
  6. Step 6: Final answer
    x = 595.13

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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.