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Finding the Fourth Proportional to 892.20, 1,338.16 and 242.99

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Solution

The fourth proportional to 892.20, 1,338.16 and 242.99 is: 364.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    892.20 : 1,338.16 = 242.99 : x
  2. Step 2: Convert to fraction form
    892.20/1,338.16 = 242.99/x
  3. Step 3: Cross multiply
    892.20x = 1,338.16 × 242.99
  4. Step 4: Simplify right side
    892.20x = 325,159.50
  5. Step 5: Solve for x
    x = 325,159.50/892.20
  6. Step 6: Final answer
    x = 364.45

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1.5x scale

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.