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Finding the Fourth Proportional to 673.06, 930.49 and 666.91

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Solution

The fourth proportional to 673.06, 930.49 and 666.91 is: 921.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.06 : 930.49 = 666.91 : x
  2. Step 2: Convert to fraction form
    673.06/930.49 = 666.91/x
  3. Step 3: Cross multiply
    673.06x = 930.49 × 666.91
  4. Step 4: Simplify right side
    673.06x = 620,554.75
  5. Step 5: Solve for x
    x = 620,554.75/673.06
  6. Step 6: Final answer
    x = 921.99

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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.