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Finding the Fourth Proportional to 622.04, 858.61 and 400.99

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Solution

The fourth proportional to 622.04, 858.61 and 400.99 is: 553.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.04 : 858.61 = 400.99 : x
  2. Step 2: Convert to fraction form
    622.04/858.61 = 400.99/x
  3. Step 3: Cross multiply
    622.04x = 858.61 × 400.99
  4. Step 4: Simplify right side
    622.04x = 344,290.87
  5. Step 5: Solve for x
    x = 344,290.87/622.04
  6. Step 6: Final answer
    x = 553.48

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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.