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Finding the Fourth Proportional to 845.93, 1,164.97 and 688.29

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Solution

The fourth proportional to 845.93, 1,164.97 and 688.29 is: 947.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.93 : 1,164.97 = 688.29 : x
  2. Step 2: Convert to fraction form
    845.93/1,164.97 = 688.29/x
  3. Step 3: Cross multiply
    845.93x = 1,164.97 × 688.29
  4. Step 4: Simplify right side
    845.93x = 801,837.20
  5. Step 5: Solve for x
    x = 801,837.20/845.93
  6. Step 6: Final answer
    x = 947.88

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1.5x scale

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.