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Finding the Fourth Proportional to 542.40, 813.08 and 298.64

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Solution

The fourth proportional to 542.40, 813.08 and 298.64 is: 447.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.40 : 813.08 = 298.64 : x
  2. Step 2: Convert to fraction form
    542.40/813.08 = 298.64/x
  3. Step 3: Cross multiply
    542.40x = 813.08 × 298.64
  4. Step 4: Simplify right side
    542.40x = 242,818.21
  5. Step 5: Solve for x
    x = 242,818.21/542.40
  6. Step 6: Final answer
    x = 447.67

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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.