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Finding the Fourth Proportional to 832.77, 1,248.69 and 387.54

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Solution

The fourth proportional to 832.77, 1,248.69 and 387.54 is: 581.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    832.77 : 1,248.69 = 387.54 : x
  2. Step 2: Convert to fraction form
    832.77/1,248.69 = 387.54/x
  3. Step 3: Cross multiply
    832.77x = 1,248.69 × 387.54
  4. Step 4: Simplify right side
    832.77x = 483,917.32
  5. Step 5: Solve for x
    x = 483,917.32/832.77
  6. Step 6: Final answer
    x = 581.09

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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.