Home / 1,543.80-2,130.49-845.17

Finding the Fourth Proportional to 1,543.80, 2,130.49 and 845.17

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Solution

The fourth proportional to 1,543.80, 2,130.49 and 845.17 is: 1,166.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.80 : 2,130.49 = 845.17 : x
  2. Step 2: Convert to fraction form
    1,543.80/2,130.49 = 845.17/x
  3. Step 3: Cross multiply
    1,543.80x = 2,130.49 × 845.17
  4. Step 4: Simplify right side
    1,543.80x = 1,800,626.23
  5. Step 5: Solve for x
    x = 1,800,626.23/1,543.80
  6. Step 6: Final answer
    x = 1,166.36

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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.