Home / 2,988.70-4,123.32-1,809.34

Finding the Fourth Proportional to 2,988.70, 4,123.32 and 1,809.34

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Solution

The fourth proportional to 2,988.70, 4,123.32 and 1,809.34 is: 2,496.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.70 : 4,123.32 = 1,809.34 : x
  2. Step 2: Convert to fraction form
    2,988.70/4,123.32 = 1,809.34/x
  3. Step 3: Cross multiply
    2,988.70x = 4,123.32 × 1,809.34
  4. Step 4: Simplify right side
    2,988.70x = 7,460,487.81
  5. Step 5: Solve for x
    x = 7,460,487.81/2,988.70
  6. Step 6: Final answer
    x = 2,496.23

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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.