Home / 1,421.90-2,141.23-1,241.47

Finding the Fourth Proportional to 1,421.90, 2,141.23 and 1,241.47

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Solution

The fourth proportional to 1,421.90, 2,141.23 and 1,241.47 is: 1,869.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.90 : 2,141.23 = 1,241.47 : x
  2. Step 2: Convert to fraction form
    1,421.90/2,141.23 = 1,241.47/x
  3. Step 3: Cross multiply
    1,421.90x = 2,141.23 × 1,241.47
  4. Step 4: Simplify right side
    1,421.90x = 2,658,272.81
  5. Step 5: Solve for x
    x = 2,658,272.81/1,421.90
  6. Step 6: Final answer
    x = 1,869.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.