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Finding the Fourth Proportional to 572.68, 858.39 and 374.78

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Solution

The fourth proportional to 572.68, 858.39 and 374.78 is: 561.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.68 : 858.39 = 374.78 : x
  2. Step 2: Convert to fraction form
    572.68/858.39 = 374.78/x
  3. Step 3: Cross multiply
    572.68x = 858.39 × 374.78
  4. Step 4: Simplify right side
    572.68x = 321,708.61
  5. Step 5: Solve for x
    x = 321,708.61/572.68
  6. Step 6: Final answer
    x = 561.76

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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.