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Finding the Fourth Proportional to 848.48, 1,274.86 and 540.48

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Solution

The fourth proportional to 848.48, 1,274.86 and 540.48 is: 812.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.48 : 1,274.86 = 540.48 : x
  2. Step 2: Convert to fraction form
    848.48/1,274.86 = 540.48/x
  3. Step 3: Cross multiply
    848.48x = 1,274.86 × 540.48
  4. Step 4: Simplify right side
    848.48x = 689,036.33
  5. Step 5: Solve for x
    x = 689,036.33/848.48
  6. Step 6: Final answer
    x = 812.08

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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.