Home / 1,420.62-2,130.93-1,279.68

Finding the Fourth Proportional to 1,420.62, 2,130.93 and 1,279.68

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Solution

The fourth proportional to 1,420.62, 2,130.93 and 1,279.68 is: 1,919.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.62 : 2,130.93 = 1,279.68 : x
  2. Step 2: Convert to fraction form
    1,420.62/2,130.93 = 1,279.68/x
  3. Step 3: Cross multiply
    1,420.62x = 2,130.93 × 1,279.68
  4. Step 4: Simplify right side
    1,420.62x = 2,726,908.50
  5. Step 5: Solve for x
    x = 2,726,908.50/1,420.62
  6. Step 6: Final answer
    x = 1,919.52

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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.