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Finding the Fourth Proportional to 855.68, 1,181.04 and 545

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Solution

The fourth proportional to 855.68, 1,181.04 and 545 is: 752.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.68 : 1,181.04 = 545 : x
  2. Step 2: Convert to fraction form
    855.68/1,181.04 = 545/x
  3. Step 3: Cross multiply
    855.68x = 1,181.04 × 545
  4. Step 4: Simplify right side
    855.68x = 643,666.80
  5. Step 5: Solve for x
    x = 643,666.80/855.68
  6. Step 6: Final answer
    x = 752.23

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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.