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Finding the Fourth Proportional to 1,920.51, 2,881.98 and 946.69

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Solution

The fourth proportional to 1,920.51, 2,881.98 and 946.69 is: 1,420.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,920.51 : 2,881.98 = 946.69 : x
  2. Step 2: Convert to fraction form
    1,920.51/2,881.98 = 946.69/x
  3. Step 3: Cross multiply
    1,920.51x = 2,881.98 × 946.69
  4. Step 4: Simplify right side
    1,920.51x = 2,728,334.44
  5. Step 5: Solve for x
    x = 2,728,334.44/1,920.51
  6. Step 6: Final answer
    x = 1,420.63

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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.