Home / 1,478.49-2,220.81-1,247.83

Finding the Fourth Proportional to 1,478.49, 2,220.81 and 1,247.83

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Solution

The fourth proportional to 1,478.49, 2,220.81 and 1,247.83 is: 1,874.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,478.49 : 2,220.81 = 1,247.83 : x
  2. Step 2: Convert to fraction form
    1,478.49/2,220.81 = 1,247.83/x
  3. Step 3: Cross multiply
    1,478.49x = 2,220.81 × 1,247.83
  4. Step 4: Simplify right side
    1,478.49x = 2,771,193.34
  5. Step 5: Solve for x
    x = 2,771,193.34/1,478.49
  6. Step 6: Final answer
    x = 1,874.34

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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.