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Finding the Fourth Proportional to 630.22, 945.60 and 425.56

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Solution

The fourth proportional to 630.22, 945.60 and 425.56 is: 638.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.22 : 945.60 = 425.56 : x
  2. Step 2: Convert to fraction form
    630.22/945.60 = 425.56/x
  3. Step 3: Cross multiply
    630.22x = 945.60 × 425.56
  4. Step 4: Simplify right side
    630.22x = 402,409.54
  5. Step 5: Solve for x
    x = 402,409.54/630.22
  6. Step 6: Final answer
    x = 638.52

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1.5x scale

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.