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Finding the Fourth Proportional to 1,621.74, 2,433.75 and 648.12

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Solution

The fourth proportional to 1,621.74, 2,433.75 and 648.12 is: 972.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.74 : 2,433.75 = 648.12 : x
  2. Step 2: Convert to fraction form
    1,621.74/2,433.75 = 648.12/x
  3. Step 3: Cross multiply
    1,621.74x = 2,433.75 × 648.12
  4. Step 4: Simplify right side
    1,621.74x = 1,577,362.05
  5. Step 5: Solve for x
    x = 1,577,362.05/1,621.74
  6. Step 6: Final answer
    x = 972.64

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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.