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Finding the Fourth Proportional to 1,914.15, 2,869.17 and 989.46

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Solution

The fourth proportional to 1,914.15, 2,869.17 and 989.46 is: 1,483.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,914.15 : 2,869.17 = 989.46 : x
  2. Step 2: Convert to fraction form
    1,914.15/2,869.17 = 989.46/x
  3. Step 3: Cross multiply
    1,914.15x = 2,869.17 × 989.46
  4. Step 4: Simplify right side
    1,914.15x = 2,838,928.95
  5. Step 5: Solve for x
    x = 2,838,928.95/1,914.15
  6. Step 6: Final answer
    x = 1,483.13

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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.