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Finding the Fourth Proportional to 5,090.76, 7,638.03 and 1,628.28

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Solution

The fourth proportional to 5,090.76, 7,638.03 and 1,628.28 is: 2,443.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,090.76 : 7,638.03 = 1,628.28 : x
  2. Step 2: Convert to fraction form
    5,090.76/7,638.03 = 1,628.28/x
  3. Step 3: Cross multiply
    5,090.76x = 7,638.03 × 1,628.28
  4. Step 4: Simplify right side
    5,090.76x = 12,436,851.49
  5. Step 5: Solve for x
    x = 12,436,851.49/5,090.76
  6. Step 6: Final answer
    x = 2,443.02

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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.