Home / 1,421.33-2,120.57-1,265.40

Finding the Fourth Proportional to 1,421.33, 2,120.57 and 1,265.40

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Solution

The fourth proportional to 1,421.33, 2,120.57 and 1,265.40 is: 1,887.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.33 : 2,120.57 = 1,265.40 : x
  2. Step 2: Convert to fraction form
    1,421.33/2,120.57 = 1,265.40/x
  3. Step 3: Cross multiply
    1,421.33x = 2,120.57 × 1,265.40
  4. Step 4: Simplify right side
    1,421.33x = 2,683,362.95
  5. Step 5: Solve for x
    x = 2,683,362.95/1,421.33
  6. Step 6: Final answer
    x = 1,887.92

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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.