Home / 1,421.58-2,130.21-1,274.34

Finding the Fourth Proportional to 1,421.58, 2,130.21 and 1,274.34

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Solution

The fourth proportional to 1,421.58, 2,130.21 and 1,274.34 is: 1,909.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.58 : 2,130.21 = 1,274.34 : x
  2. Step 2: Convert to fraction form
    1,421.58/2,130.21 = 1,274.34/x
  3. Step 3: Cross multiply
    1,421.58x = 2,130.21 × 1,274.34
  4. Step 4: Simplify right side
    1,421.58x = 2,714,611.81
  5. Step 5: Solve for x
    x = 2,714,611.81/1,421.58
  6. Step 6: Final answer
    x = 1,909.57

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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.