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Finding the Fourth Proportional to 210,491.93, 290,479.10 and 115,000.22

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Solution

The fourth proportional to 210,491.93, 290,479.10 and 115,000.22 is: 158,700.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,491.93 : 290,479.10 = 115,000.22 : x
  2. Step 2: Convert to fraction form
    210,491.93/290,479.10 = 115,000.22/x
  3. Step 3: Cross multiply
    210,491.93x = 290,479.10 × 115,000.22
  4. Step 4: Simplify right side
    210,491.93x = 33,405,160,556.60
  5. Step 5: Solve for x
    x = 33,405,160,556.60/210,491.93
  6. Step 6: Final answer
    x = 158,700.43

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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.