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Finding the Fourth Proportional to 557.99, 837.57 and 411.91

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Solution

The fourth proportional to 557.99, 837.57 and 411.91 is: 618.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.99 : 837.57 = 411.91 : x
  2. Step 2: Convert to fraction form
    557.99/837.57 = 411.91/x
  3. Step 3: Cross multiply
    557.99x = 837.57 × 411.91
  4. Step 4: Simplify right side
    557.99x = 345,003.46
  5. Step 5: Solve for x
    x = 345,003.46/557.99
  6. Step 6: Final answer
    x = 618.30

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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.