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Finding the Fourth Proportional to 671.22, 1,001.98 and 623.16

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Solution

The fourth proportional to 671.22, 1,001.98 and 623.16 is: 930.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.22 : 1,001.98 = 623.16 : x
  2. Step 2: Convert to fraction form
    671.22/1,001.98 = 623.16/x
  3. Step 3: Cross multiply
    671.22x = 1,001.98 × 623.16
  4. Step 4: Simplify right side
    671.22x = 624,397.92
  5. Step 5: Solve for x
    x = 624,397.92/671.22
  6. Step 6: Final answer
    x = 930.24

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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.