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Finding the Fourth Proportional to 622.18, 858.30 and 456.04

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Solution

The fourth proportional to 622.18, 858.30 and 456.04 is: 629.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.18 : 858.30 = 456.04 : x
  2. Step 2: Convert to fraction form
    622.18/858.30 = 456.04/x
  3. Step 3: Cross multiply
    622.18x = 858.30 × 456.04
  4. Step 4: Simplify right side
    622.18x = 391,419.13
  5. Step 5: Solve for x
    x = 391,419.13/622.18
  6. Step 6: Final answer
    x = 629.11

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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.