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Finding the Fourth Proportional to 575.08, 860.94 and 438.68

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Solution

The fourth proportional to 575.08, 860.94 and 438.68 is: 656.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    575.08 : 860.94 = 438.68 : x
  2. Step 2: Convert to fraction form
    575.08/860.94 = 438.68/x
  3. Step 3: Cross multiply
    575.08x = 860.94 × 438.68
  4. Step 4: Simplify right side
    575.08x = 377,677.16
  5. Step 5: Solve for x
    x = 377,677.16/575.08
  6. Step 6: Final answer
    x = 656.74

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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.