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Finding the Fourth Proportional to 945.56, 1,305.06 and 531.56

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Solution

The fourth proportional to 945.56, 1,305.06 and 531.56 is: 733.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.56 : 1,305.06 = 531.56 : x
  2. Step 2: Convert to fraction form
    945.56/1,305.06 = 531.56/x
  3. Step 3: Cross multiply
    945.56x = 1,305.06 × 531.56
  4. Step 4: Simplify right side
    945.56x = 693,718.96
  5. Step 5: Solve for x
    x = 693,718.96/945.56
  6. Step 6: Final answer
    x = 733.66

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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.