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Finding the Fourth Proportional to 1,424.76, 1,964.90 and 926.92

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Solution

The fourth proportional to 1,424.76, 1,964.90 and 926.92 is: 1,278.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,424.76 : 1,964.90 = 926.92 : x
  2. Step 2: Convert to fraction form
    1,424.76/1,964.90 = 926.92/x
  3. Step 3: Cross multiply
    1,424.76x = 1,964.90 × 926.92
  4. Step 4: Simplify right side
    1,424.76x = 1,821,305.11
  5. Step 5: Solve for x
    x = 1,821,305.11/1,424.76
  6. Step 6: Final answer
    x = 1,278.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.