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Finding the Fourth Proportional to 622.16, 858.59 and 342.39

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Solution

The fourth proportional to 622.16, 858.59 and 342.39 is: 472.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.16 : 858.59 = 342.39 : x
  2. Step 2: Convert to fraction form
    622.16/858.59 = 342.39/x
  3. Step 3: Cross multiply
    622.16x = 858.59 × 342.39
  4. Step 4: Simplify right side
    622.16x = 293,969.20
  5. Step 5: Solve for x
    x = 293,969.20/622.16
  6. Step 6: Final answer
    x = 472.50

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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.