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Finding the Fourth Proportional to 307,034.55, 423,738.88 and 171,090.63

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Solution

The fourth proportional to 307,034.55, 423,738.88 and 171,090.63 is: 236,122.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,034.55 : 423,738.88 = 171,090.63 : x
  2. Step 2: Convert to fraction form
    307,034.55/423,738.88 = 171,090.63/x
  3. Step 3: Cross multiply
    307,034.55x = 423,738.88 × 171,090.63
  4. Step 4: Simplify right side
    307,034.55x = 72,497,751,506.97
  5. Step 5: Solve for x
    x = 72,497,751,506.97/307,034.55
  6. Step 6: Final answer
    x = 236,122.45

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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.