Home / 389,918.56-538,087.72-211,070.56

Finding the Fourth Proportional to 389,918.56, 538,087.72 and 211,070.56

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Solution

The fourth proportional to 389,918.56, 538,087.72 and 211,070.56 is: 291,277.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,918.56 : 538,087.72 = 211,070.56 : x
  2. Step 2: Convert to fraction form
    389,918.56/538,087.72 = 211,070.56/x
  3. Step 3: Cross multiply
    389,918.56x = 538,087.72 × 211,070.56
  4. Step 4: Simplify right side
    389,918.56x = 113,574,476,389.52
  5. Step 5: Solve for x
    x = 113,574,476,389.52/389,918.56
  6. Step 6: Final answer
    x = 291,277.43

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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.