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Finding the Fourth Proportional to 882.47, 1,218.03 and 620.57

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Solution

The fourth proportional to 882.47, 1,218.03 and 620.57 is: 856.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.47 : 1,218.03 = 620.57 : x
  2. Step 2: Convert to fraction form
    882.47/1,218.03 = 620.57/x
  3. Step 3: Cross multiply
    882.47x = 1,218.03 × 620.57
  4. Step 4: Simplify right side
    882.47x = 755,872.88
  5. Step 5: Solve for x
    x = 755,872.88/882.47
  6. Step 6: Final answer
    x = 856.54

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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.