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Finding the Fourth Proportional to 622.65, 859.59 and 412.75

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Solution

The fourth proportional to 622.65, 859.59 and 412.75 is: 569.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.65 : 859.59 = 412.75 : x
  2. Step 2: Convert to fraction form
    622.65/859.59 = 412.75/x
  3. Step 3: Cross multiply
    622.65x = 859.59 × 412.75
  4. Step 4: Simplify right side
    622.65x = 354,795.77
  5. Step 5: Solve for x
    x = 354,795.77/622.65
  6. Step 6: Final answer
    x = 569.82

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Double scale
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1.5x scale

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.