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Finding the Fourth Proportional to 857.00, 1,182.78 and 484.00

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Solution

The fourth proportional to 857.00, 1,182.78 and 484.00 is: 667.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    857.00 : 1,182.78 = 484.00 : x
  2. Step 2: Convert to fraction form
    857.00/1,182.78 = 484.00/x
  3. Step 3: Cross multiply
    857.00x = 1,182.78 × 484.00
  4. Step 4: Simplify right side
    857.00x = 572,462.56
  5. Step 5: Solve for x
    x = 572,462.56/857.00
  6. Step 6: Final answer
    x = 667.98

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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.