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Finding the Fourth Proportional to 622.65, 859.19 and 342.88

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Solution

The fourth proportional to 622.65, 859.19 and 342.88 is: 473.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.65 : 859.19 = 342.88 : x
  2. Step 2: Convert to fraction form
    622.65/859.19 = 342.88/x
  3. Step 3: Cross multiply
    622.65x = 859.19 × 342.88
  4. Step 4: Simplify right side
    622.65x = 294,599.07
  5. Step 5: Solve for x
    x = 294,599.07/622.65
  6. Step 6: Final answer
    x = 473.14

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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.