Home / 430,638.80-646,103.09-190,719.43

Finding the Fourth Proportional to 430,638.80, 646,103.09 and 190,719.43

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Solution

The fourth proportional to 430,638.80, 646,103.09 and 190,719.43 is: 286,143.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,638.80 : 646,103.09 = 190,719.43 : x
  2. Step 2: Convert to fraction form
    430,638.80/646,103.09 = 190,719.43/x
  3. Step 3: Cross multiply
    430,638.80x = 646,103.09 × 190,719.43
  4. Step 4: Simplify right side
    430,638.80x = 123,224,412,092.44
  5. Step 5: Solve for x
    x = 123,224,412,092.44/430,638.80
  6. Step 6: Final answer
    x = 286,143.31

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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.