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Finding the Fourth Proportional to 2,920.73, 4,381.70 and 841.05

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Solution

The fourth proportional to 2,920.73, 4,381.70 and 841.05 is: 1,261.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,920.73 : 4,381.70 = 841.05 : x
  2. Step 2: Convert to fraction form
    2,920.73/4,381.70 = 841.05/x
  3. Step 3: Cross multiply
    2,920.73x = 4,381.70 × 841.05
  4. Step 4: Simplify right side
    2,920.73x = 3,685,224.58
  5. Step 5: Solve for x
    x = 3,685,224.58/2,920.73
  6. Step 6: Final answer
    x = 1,261.75

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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.