Home / 1,623.21-2,432.07-1,278.78

Finding the Fourth Proportional to 1,623.21, 2,432.07 and 1,278.78

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Solution

The fourth proportional to 1,623.21, 2,432.07 and 1,278.78 is: 1,916.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,623.21 : 2,432.07 = 1,278.78 : x
  2. Step 2: Convert to fraction form
    1,623.21/2,432.07 = 1,278.78/x
  3. Step 3: Cross multiply
    1,623.21x = 2,432.07 × 1,278.78
  4. Step 4: Simplify right side
    1,623.21x = 3,110,082.47
  5. Step 5: Solve for x
    x = 3,110,082.47/1,623.21
  6. Step 6: Final answer
    x = 1,916.01

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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.