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Finding the Fourth Proportional to 622.76, 859.28 and 426.20

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Solution

The fourth proportional to 622.76, 859.28 and 426.20 is: 588.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.76 : 859.28 = 426.20 : x
  2. Step 2: Convert to fraction form
    622.76/859.28 = 426.20/x
  3. Step 3: Cross multiply
    622.76x = 859.28 × 426.20
  4. Step 4: Simplify right side
    622.76x = 366,225.14
  5. Step 5: Solve for x
    x = 366,225.14/622.76
  6. Step 6: Final answer
    x = 588.07

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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.