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Finding the Fourth Proportional to 404.66, 557.15 and 342.36

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Solution

The fourth proportional to 404.66, 557.15 and 342.36 is: 471.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.66 : 557.15 = 342.36 : x
  2. Step 2: Convert to fraction form
    404.66/557.15 = 342.36/x
  3. Step 3: Cross multiply
    404.66x = 557.15 × 342.36
  4. Step 4: Simplify right side
    404.66x = 190,744.16
  5. Step 5: Solve for x
    x = 190,744.16/404.66
  6. Step 6: Final answer
    x = 471.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.