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Finding the Fourth Proportional to 1,435.54, 2,153.36 and 448.45

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Solution

The fourth proportional to 1,435.54, 2,153.36 and 448.45 is: 672.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,435.54 : 2,153.36 = 448.45 : x
  2. Step 2: Convert to fraction form
    1,435.54/2,153.36 = 448.45/x
  3. Step 3: Cross multiply
    1,435.54x = 2,153.36 × 448.45
  4. Step 4: Simplify right side
    1,435.54x = 965,674.29
  5. Step 5: Solve for x
    x = 965,674.29/1,435.54
  6. Step 6: Final answer
    x = 672.69

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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.