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Finding the Fourth Proportional to 2,620.54, 3,930.81 and 977.50

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Solution

The fourth proportional to 2,620.54, 3,930.81 and 977.50 is: 1,466.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,620.54 : 3,930.81 = 977.50 : x
  2. Step 2: Convert to fraction form
    2,620.54/3,930.81 = 977.50/x
  3. Step 3: Cross multiply
    2,620.54x = 3,930.81 × 977.50
  4. Step 4: Simplify right side
    2,620.54x = 3,842,366.78
  5. Step 5: Solve for x
    x = 3,842,366.78/2,620.54
  6. Step 6: Final answer
    x = 1,466.25

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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.