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Finding the Fourth Proportional to 670.56, 927.30 and 641.58

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Solution

The fourth proportional to 670.56, 927.30 and 641.58 is: 887.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.56 : 927.30 = 641.58 : x
  2. Step 2: Convert to fraction form
    670.56/927.30 = 641.58/x
  3. Step 3: Cross multiply
    670.56x = 927.30 × 641.58
  4. Step 4: Simplify right side
    670.56x = 594,937.13
  5. Step 5: Solve for x
    x = 594,937.13/670.56
  6. Step 6: Final answer
    x = 887.22

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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.