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Finding the Fourth Proportional to 527.09, 790.74 and 218.84

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Solution

The fourth proportional to 527.09, 790.74 and 218.84 is: 328.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.09 : 790.74 = 218.84 : x
  2. Step 2: Convert to fraction form
    527.09/790.74 = 218.84/x
  3. Step 3: Cross multiply
    527.09x = 790.74 × 218.84
  4. Step 4: Simplify right side
    527.09x = 173,041.59
  5. Step 5: Solve for x
    x = 173,041.59/527.09
  6. Step 6: Final answer
    x = 328.30

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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.