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Finding the Fourth Proportional to 882.70, 1,218.07 and 484.28

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Solution

The fourth proportional to 882.70, 1,218.07 and 484.28 is: 668.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.70 : 1,218.07 = 484.28 : x
  2. Step 2: Convert to fraction form
    882.70/1,218.07 = 484.28/x
  3. Step 3: Cross multiply
    882.70x = 1,218.07 × 484.28
  4. Step 4: Simplify right side
    882.70x = 589,884.52
  5. Step 5: Solve for x
    x = 589,884.52/882.70
  6. Step 6: Final answer
    x = 668.28

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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.