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Finding the Fourth Proportional to 1,543.74, 2,130.34 and 845.12

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Solution

The fourth proportional to 1,543.74, 2,130.34 and 845.12 is: 1,166.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.74 : 2,130.34 = 845.12 : x
  2. Step 2: Convert to fraction form
    1,543.74/2,130.34 = 845.12/x
  3. Step 3: Cross multiply
    1,543.74x = 2,130.34 × 845.12
  4. Step 4: Simplify right side
    1,543.74x = 1,800,392.94
  5. Step 5: Solve for x
    x = 1,800,392.94/1,543.74
  6. Step 6: Final answer
    x = 1,166.25

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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.