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Finding the Fourth Proportional to 557.43, 835.57 and 374.40

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Solution

The fourth proportional to 557.43, 835.57 and 374.40 is: 561.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.43 : 835.57 = 374.40 : x
  2. Step 2: Convert to fraction form
    557.43/835.57 = 374.40/x
  3. Step 3: Cross multiply
    557.43x = 835.57 × 374.40
  4. Step 4: Simplify right side
    557.43x = 312,837.41
  5. Step 5: Solve for x
    x = 312,837.41/557.43
  6. Step 6: Final answer
    x = 561.21

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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.