Home / 639,742.96-882,851.34-353,256.76

Finding the Fourth Proportional to 639,742.96, 882,851.34 and 353,256.76

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Solution

The fourth proportional to 639,742.96, 882,851.34 and 353,256.76 is: 487,497.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,742.96 : 882,851.34 = 353,256.76 : x
  2. Step 2: Convert to fraction form
    639,742.96/882,851.34 = 353,256.76/x
  3. Step 3: Cross multiply
    639,742.96x = 882,851.34 × 353,256.76
  4. Step 4: Simplify right side
    639,742.96x = 311,873,203,930.06
  5. Step 5: Solve for x
    x = 311,873,203,930.06/639,742.96
  6. Step 6: Final answer
    x = 487,497.67

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Double scale
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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.