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Finding the Fourth Proportional to 670.97, 1,001.61 and 622.91

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Solution

The fourth proportional to 670.97, 1,001.61 and 622.91 is: 929.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.97 : 1,001.61 = 622.91 : x
  2. Step 2: Convert to fraction form
    670.97/1,001.61 = 622.91/x
  3. Step 3: Cross multiply
    670.97x = 1,001.61 × 622.91
  4. Step 4: Simplify right side
    670.97x = 623,915.39
  5. Step 5: Solve for x
    x = 623,915.39/670.97
  6. Step 6: Final answer
    x = 929.87

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1.5x scale

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.