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Finding the Fourth Proportional to 622.40, 929.68 and 605.12

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Solution

The fourth proportional to 622.40, 929.68 and 605.12 is: 903.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.40 : 929.68 = 605.12 : x
  2. Step 2: Convert to fraction form
    622.40/929.68 = 605.12/x
  3. Step 3: Cross multiply
    622.40x = 929.68 × 605.12
  4. Step 4: Simplify right side
    622.40x = 562,567.96
  5. Step 5: Solve for x
    x = 562,567.96/622.40
  6. Step 6: Final answer
    x = 903.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.