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Finding the Fourth Proportional to 210,855.36, 290,987.33 and 115,359.87

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Solution

The fourth proportional to 210,855.36, 290,987.33 and 115,359.87 is: 159,200.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,855.36 : 290,987.33 = 115,359.87 : x
  2. Step 2: Convert to fraction form
    210,855.36/290,987.33 = 115,359.87/x
  3. Step 3: Cross multiply
    210,855.36x = 290,987.33 × 115,359.87
  4. Step 4: Simplify right side
    210,855.36x = 33,568,259,983.65
  5. Step 5: Solve for x
    x = 33,568,259,983.65/210,855.36
  6. Step 6: Final answer
    x = 159,200.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.