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Finding the Fourth Proportional to 597.78, 897.21 and 489.31

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Solution

The fourth proportional to 597.78, 897.21 and 489.31 is: 734.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    597.78 : 897.21 = 489.31 : x
  2. Step 2: Convert to fraction form
    597.78/897.21 = 489.31/x
  3. Step 3: Cross multiply
    597.78x = 897.21 × 489.31
  4. Step 4: Simplify right side
    597.78x = 439,011.58
  5. Step 5: Solve for x
    x = 439,011.58/597.78
  6. Step 6: Final answer
    x = 734.40

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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.