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Finding the Fourth Proportional to 4,990, 7,485 and 1,527.16

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Solution

The fourth proportional to 4,990, 7,485 and 1,527.16 is: 2,290.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,990 : 7,485 = 1,527.16 : x
  2. Step 2: Convert to fraction form
    4,990/7,485 = 1,527.16/x
  3. Step 3: Cross multiply
    4,990x = 7,485 × 1,527.16
  4. Step 4: Simplify right side
    4,990x = 11,430,792.60
  5. Step 5: Solve for x
    x = 11,430,792.60/4,990
  6. Step 6: Final answer
    x = 2,290.74

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Double scale
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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.