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Finding the Fourth Proportional to 622.19, 857.73 and 445.10

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Solution

The fourth proportional to 622.19, 857.73 and 445.10 is: 613.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.19 : 857.73 = 445.10 : x
  2. Step 2: Convert to fraction form
    622.19/857.73 = 445.10/x
  3. Step 3: Cross multiply
    622.19x = 857.73 × 445.10
  4. Step 4: Simplify right side
    622.19x = 381,775.62
  5. Step 5: Solve for x
    x = 381,775.62/622.19
  6. Step 6: Final answer
    x = 613.60

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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.