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Finding the Fourth Proportional to 1,945.82, 2,918.91 and 712.93

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Solution

The fourth proportional to 1,945.82, 2,918.91 and 712.93 is: 1,069.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,945.82 : 2,918.91 = 712.93 : x
  2. Step 2: Convert to fraction form
    1,945.82/2,918.91 = 712.93/x
  3. Step 3: Cross multiply
    1,945.82x = 2,918.91 × 712.93
  4. Step 4: Simplify right side
    1,945.82x = 2,080,971.21
  5. Step 5: Solve for x
    x = 2,080,971.21/1,945.82
  6. Step 6: Final answer
    x = 1,069.46

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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.