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Finding the Fourth Proportional to 572.54, 858.86 and 260.39

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Solution

The fourth proportional to 572.54, 858.86 and 260.39 is: 390.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.54 : 858.86 = 260.39 : x
  2. Step 2: Convert to fraction form
    572.54/858.86 = 260.39/x
  3. Step 3: Cross multiply
    572.54x = 858.86 × 260.39
  4. Step 4: Simplify right side
    572.54x = 223,638.56
  5. Step 5: Solve for x
    x = 223,638.56/572.54
  6. Step 6: Final answer
    x = 390.61

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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.