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Finding the Fourth Proportional to 1,218.34, 1,824.74 and 730.45

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Solution

The fourth proportional to 1,218.34, 1,824.74 and 730.45 is: 1,094.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.34 : 1,824.74 = 730.45 : x
  2. Step 2: Convert to fraction form
    1,218.34/1,824.74 = 730.45/x
  3. Step 3: Cross multiply
    1,218.34x = 1,824.74 × 730.45
  4. Step 4: Simplify right side
    1,218.34x = 1,332,868.56
  5. Step 5: Solve for x
    x = 1,332,868.56/1,218.34
  6. Step 6: Final answer
    x = 1,094.01

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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.