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Finding the Fourth Proportional to 2,485.40, 3,728.07 and 636.50

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Solution

The fourth proportional to 2,485.40, 3,728.07 and 636.50 is: 954.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,485.40 : 3,728.07 = 636.50 : x
  2. Step 2: Convert to fraction form
    2,485.40/3,728.07 = 636.50/x
  3. Step 3: Cross multiply
    2,485.40x = 3,728.07 × 636.50
  4. Step 4: Simplify right side
    2,485.40x = 2,372,897.91
  5. Step 5: Solve for x
    x = 2,372,897.91/2,485.40
  6. Step 6: Final answer
    x = 954.74

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1.5x scale

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.