Home / 1,323.08-1,985.42-543.45

Finding the Fourth Proportional to 1,323.08, 1,985.42 and 543.45

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Solution

The fourth proportional to 1,323.08, 1,985.42 and 543.45 is: 815.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,323.08 : 1,985.42 = 543.45 : x
  2. Step 2: Convert to fraction form
    1,323.08/1,985.42 = 543.45/x
  3. Step 3: Cross multiply
    1,323.08x = 1,985.42 × 543.45
  4. Step 4: Simplify right side
    1,323.08x = 1,078,977.86
  5. Step 5: Solve for x
    x = 1,078,977.86/1,323.08
  6. Step 6: Final answer
    x = 815.51

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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.