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Finding the Fourth Proportional to 569.30, 855.24 and 405.17

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Solution

The fourth proportional to 569.30, 855.24 and 405.17 is: 608.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    569.30 : 855.24 = 405.17 : x
  2. Step 2: Convert to fraction form
    569.30/855.24 = 405.17/x
  3. Step 3: Cross multiply
    569.30x = 855.24 × 405.17
  4. Step 4: Simplify right side
    569.30x = 346,513.31
  5. Step 5: Solve for x
    x = 346,513.31/569.30
  6. Step 6: Final answer
    x = 608.67

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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.