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Finding the Fourth Proportional to 894.90, 1,235.45 and 540.89

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Solution

The fourth proportional to 894.90, 1,235.45 and 540.89 is: 746.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.90 : 1,235.45 = 540.89 : x
  2. Step 2: Convert to fraction form
    894.90/1,235.45 = 540.89/x
  3. Step 3: Cross multiply
    894.90x = 1,235.45 × 540.89
  4. Step 4: Simplify right side
    894.90x = 668,233.67
  5. Step 5: Solve for x
    x = 668,233.67/894.90
  6. Step 6: Final answer
    x = 746.71

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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.