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Finding the Fourth Proportional to 972.67, 1,341.70 and 622.75

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Solution

The fourth proportional to 972.67, 1,341.70 and 622.75 is: 859.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    972.67 : 1,341.70 = 622.75 : x
  2. Step 2: Convert to fraction form
    972.67/1,341.70 = 622.75/x
  3. Step 3: Cross multiply
    972.67x = 1,341.70 × 622.75
  4. Step 4: Simplify right side
    972.67x = 835,543.68
  5. Step 5: Solve for x
    x = 835,543.68/972.67
  6. Step 6: Final answer
    x = 859.02

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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.