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Finding the Fourth Proportional to 630.09, 869.58 and 443.79

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Solution

The fourth proportional to 630.09, 869.58 and 443.79 is: 612.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.09 : 869.58 = 443.79 : x
  2. Step 2: Convert to fraction form
    630.09/869.58 = 443.79/x
  3. Step 3: Cross multiply
    630.09x = 869.58 × 443.79
  4. Step 4: Simplify right side
    630.09x = 385,910.91
  5. Step 5: Solve for x
    x = 385,910.91/630.09
  6. Step 6: Final answer
    x = 612.47

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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.