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Finding the Fourth Proportional to 1,230.48, 1,845.72 and 581.28

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Solution

The fourth proportional to 1,230.48, 1,845.72 and 581.28 is: 871.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230.48 : 1,845.72 = 581.28 : x
  2. Step 2: Convert to fraction form
    1,230.48/1,845.72 = 581.28/x
  3. Step 3: Cross multiply
    1,230.48x = 1,845.72 × 581.28
  4. Step 4: Simplify right side
    1,230.48x = 1,072,880.12
  5. Step 5: Solve for x
    x = 1,072,880.12/1,230.48
  6. Step 6: Final answer
    x = 871.92

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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.