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Finding the Fourth Proportional to 848.16, 1,269 and 663.84

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Solution

The fourth proportional to 848.16, 1,269 and 663.84 is: 993.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.16 : 1,269 = 663.84 : x
  2. Step 2: Convert to fraction form
    848.16/1,269 = 663.84/x
  3. Step 3: Cross multiply
    848.16x = 1,269 × 663.84
  4. Step 4: Simplify right side
    848.16x = 842,412.96
  5. Step 5: Solve for x
    x = 842,412.96/848.16
  6. Step 6: Final answer
    x = 993.22

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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.