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Finding the Fourth Proportional to 2,945.16, 4,416.93 and 865.08

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Solution

The fourth proportional to 2,945.16, 4,416.93 and 865.08 is: 1,297.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,945.16 : 4,416.93 = 865.08 : x
  2. Step 2: Convert to fraction form
    2,945.16/4,416.93 = 865.08/x
  3. Step 3: Cross multiply
    2,945.16x = 4,416.93 × 865.08
  4. Step 4: Simplify right side
    2,945.16x = 3,820,997.80
  5. Step 5: Solve for x
    x = 3,820,997.80/2,945.16
  6. Step 6: Final answer
    x = 1,297.38

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1.5x scale

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.