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Finding the Fourth Proportional to 1,783.19, 2,460.80 and 997.42

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Solution

The fourth proportional to 1,783.19, 2,460.80 and 997.42 is: 1,376.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,783.19 : 2,460.80 = 997.42 : x
  2. Step 2: Convert to fraction form
    1,783.19/2,460.80 = 997.42/x
  3. Step 3: Cross multiply
    1,783.19x = 2,460.80 × 997.42
  4. Step 4: Simplify right side
    1,783.19x = 2,454,451.14
  5. Step 5: Solve for x
    x = 2,454,451.14/1,783.19
  6. Step 6: Final answer
    x = 1,376.44

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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.