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Finding the Fourth Proportional to 622.10, 858.44 and 373.40

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Solution

The fourth proportional to 622.10, 858.44 and 373.40 is: 515.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.10 : 858.44 = 373.40 : x
  2. Step 2: Convert to fraction form
    622.10/858.44 = 373.40/x
  3. Step 3: Cross multiply
    622.10x = 858.44 × 373.40
  4. Step 4: Simplify right side
    622.10x = 320,535.34
  5. Step 5: Solve for x
    x = 320,535.34/622.10
  6. Step 6: Final answer
    x = 515.25

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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.