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Finding the Fourth Proportional to 381,388.81, 526,316.56 and 211,650.25

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Solution

The fourth proportional to 381,388.81, 526,316.56 and 211,650.25 is: 292,077.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,388.81 : 526,316.56 = 211,650.25 : x
  2. Step 2: Convert to fraction form
    381,388.81/526,316.56 = 211,650.25/x
  3. Step 3: Cross multiply
    381,388.81x = 526,316.56 × 211,650.25
  4. Step 4: Simplify right side
    381,388.81x = 111,395,031,503.14
  5. Step 5: Solve for x
    x = 111,395,031,503.14/381,388.81
  6. Step 6: Final answer
    x = 292,077.35

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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.