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Finding the Fourth Proportional to 848.13, 1,268.73 and 641.16

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Solution

The fourth proportional to 848.13, 1,268.73 and 641.16 is: 959.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.13 : 1,268.73 = 641.16 : x
  2. Step 2: Convert to fraction form
    848.13/1,268.73 = 641.16/x
  3. Step 3: Cross multiply
    848.13x = 1,268.73 × 641.16
  4. Step 4: Simplify right side
    848.13x = 813,458.93
  5. Step 5: Solve for x
    x = 813,458.93/848.13
  6. Step 6: Final answer
    x = 959.12

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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.