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Finding the Fourth Proportional to 622.40, 901.57 and 622.40

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Solution

The fourth proportional to 622.40, 901.57 and 622.40 is: 901.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.40 : 901.57 = 622.40 : x
  2. Step 2: Convert to fraction form
    622.40/901.57 = 622.40/x
  3. Step 3: Cross multiply
    622.40x = 901.57 × 622.40
  4. Step 4: Simplify right side
    622.40x = 561,137.17
  5. Step 5: Solve for x
    x = 561,137.17/622.40
  6. Step 6: Final answer
    x = 901.57

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.