Home / 1,376.90-2,053.41-1,172.78

Finding the Fourth Proportional to 1,376.90, 2,053.41 and 1,172.78

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Solution

The fourth proportional to 1,376.90, 2,053.41 and 1,172.78 is: 1,749.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,376.90 : 2,053.41 = 1,172.78 : x
  2. Step 2: Convert to fraction form
    1,376.90/2,053.41 = 1,172.78/x
  3. Step 3: Cross multiply
    1,376.90x = 2,053.41 × 1,172.78
  4. Step 4: Simplify right side
    1,376.90x = 2,408,192.32
  5. Step 5: Solve for x
    x = 2,408,192.32/1,376.90
  6. Step 6: Final answer
    x = 1,749.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.