Home / 1,420.26-2,124.51-1,285.26

Finding the Fourth Proportional to 1,420.26, 2,124.51 and 1,285.26

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Solution

The fourth proportional to 1,420.26, 2,124.51 and 1,285.26 is: 1,922.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.26 : 2,124.51 = 1,285.26 : x
  2. Step 2: Convert to fraction form
    1,420.26/2,124.51 = 1,285.26/x
  3. Step 3: Cross multiply
    1,420.26x = 2,124.51 × 1,285.26
  4. Step 4: Simplify right side
    1,420.26x = 2,730,547.72
  5. Step 5: Solve for x
    x = 2,730,547.72/1,420.26
  6. Step 6: Final answer
    x = 1,922.57

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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.