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Finding the Fourth Proportional to 654.99, 904.16 and 489.54

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Solution

The fourth proportional to 654.99, 904.16 and 489.54 is: 675.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.99 : 904.16 = 489.54 : x
  2. Step 2: Convert to fraction form
    654.99/904.16 = 489.54/x
  3. Step 3: Cross multiply
    654.99x = 904.16 × 489.54
  4. Step 4: Simplify right side
    654.99x = 442,627.10
  5. Step 5: Solve for x
    x = 442,627.10/654.99
  6. Step 6: Final answer
    x = 675.78

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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.