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Finding the Fourth Proportional to 1,208.48, 1,812.80 and 342.84

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Solution

The fourth proportional to 1,208.48, 1,812.80 and 342.84 is: 514.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208.48 : 1,812.80 = 342.84 : x
  2. Step 2: Convert to fraction form
    1,208.48/1,812.80 = 342.84/x
  3. Step 3: Cross multiply
    1,208.48x = 1,812.80 × 342.84
  4. Step 4: Simplify right side
    1,208.48x = 621,500.35
  5. Step 5: Solve for x
    x = 621,500.35/1,208.48
  6. Step 6: Final answer
    x = 514.28

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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.