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Finding the Fourth Proportional to 1,621.71, 2,432.45 and 926.19

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Solution

The fourth proportional to 1,621.71, 2,432.45 and 926.19 is: 1,389.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.71 : 2,432.45 = 926.19 : x
  2. Step 2: Convert to fraction form
    1,621.71/2,432.45 = 926.19/x
  3. Step 3: Cross multiply
    1,621.71x = 2,432.45 × 926.19
  4. Step 4: Simplify right side
    1,621.71x = 2,252,906.23
  5. Step 5: Solve for x
    x = 2,252,906.23/1,621.71
  6. Step 6: Final answer
    x = 1,389.22

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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.