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Finding the Fourth Proportional to 1,228.32, 1,842.51 and 303.87

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Solution

The fourth proportional to 1,228.32, 1,842.51 and 303.87 is: 455.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,228.32 : 1,842.51 = 303.87 : x
  2. Step 2: Convert to fraction form
    1,228.32/1,842.51 = 303.87/x
  3. Step 3: Cross multiply
    1,228.32x = 1,842.51 × 303.87
  4. Step 4: Simplify right side
    1,228.32x = 559,883.51
  5. Step 5: Solve for x
    x = 559,883.51/1,228.32
  6. Step 6: Final answer
    x = 455.81

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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.