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Finding the Fourth Proportional to 578.51, 871.94 and 498.32

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Solution

The fourth proportional to 578.51, 871.94 and 498.32 is: 751.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.51 : 871.94 = 498.32 : x
  2. Step 2: Convert to fraction form
    578.51/871.94 = 498.32/x
  3. Step 3: Cross multiply
    578.51x = 871.94 × 498.32
  4. Step 4: Simplify right side
    578.51x = 434,498.29
  5. Step 5: Solve for x
    x = 434,498.29/578.51
  6. Step 6: Final answer
    x = 751.07

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.