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Finding the Fourth Proportional to 848.53, 1,273.20 and 386.45

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Solution

The fourth proportional to 848.53, 1,273.20 and 386.45 is: 579.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.53 : 1,273.20 = 386.45 : x
  2. Step 2: Convert to fraction form
    848.53/1,273.20 = 386.45/x
  3. Step 3: Cross multiply
    848.53x = 1,273.20 × 386.45
  4. Step 4: Simplify right side
    848.53x = 492,028.14
  5. Step 5: Solve for x
    x = 492,028.14/848.53
  6. Step 6: Final answer
    x = 579.86

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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.