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Finding the Fourth Proportional to 945.93, 1,418.82 and 425.96

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Solution

The fourth proportional to 945.93, 1,418.82 and 425.96 is: 638.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.93 : 1,418.82 = 425.96 : x
  2. Step 2: Convert to fraction form
    945.93/1,418.82 = 425.96/x
  3. Step 3: Cross multiply
    945.93x = 1,418.82 × 425.96
  4. Step 4: Simplify right side
    945.93x = 604,360.57
  5. Step 5: Solve for x
    x = 604,360.57/945.93
  6. Step 6: Final answer
    x = 638.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.