Home / 1,543.75-2,130.38-845.13

Finding the Fourth Proportional to 1,543.75, 2,130.38 and 845.13

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Solution

The fourth proportional to 1,543.75, 2,130.38 and 845.13 is: 1,166.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.75 : 2,130.38 = 845.13 : x
  2. Step 2: Convert to fraction form
    1,543.75/2,130.38 = 845.13/x
  3. Step 3: Cross multiply
    1,543.75x = 2,130.38 × 845.13
  4. Step 4: Simplify right side
    1,543.75x = 1,800,433.17
  5. Step 5: Solve for x
    x = 1,800,433.17/1,543.75
  6. Step 6: Final answer
    x = 1,166.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.