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Finding the Fourth Proportional to 670.70, 1,001.14 and 622.52

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Solution

The fourth proportional to 670.70, 1,001.14 and 622.52 is: 929.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.70 : 1,001.14 = 622.52 : x
  2. Step 2: Convert to fraction form
    670.70/1,001.14 = 622.52/x
  3. Step 3: Cross multiply
    670.70x = 1,001.14 × 622.52
  4. Step 4: Simplify right side
    670.70x = 623,229.67
  5. Step 5: Solve for x
    x = 623,229.67/670.70
  6. Step 6: Final answer
    x = 929.22

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.