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Finding the Fourth Proportional to 1,357.48, 1,872.68 and 885.39

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Solution

The fourth proportional to 1,357.48, 1,872.68 and 885.39 is: 1,221.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,357.48 : 1,872.68 = 885.39 : x
  2. Step 2: Convert to fraction form
    1,357.48/1,872.68 = 885.39/x
  3. Step 3: Cross multiply
    1,357.48x = 1,872.68 × 885.39
  4. Step 4: Simplify right side
    1,357.48x = 1,658,052.15
  5. Step 5: Solve for x
    x = 1,658,052.15/1,357.48
  6. Step 6: Final answer
    x = 1,221.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.