Home / 639,327.90-882,386.88-381,221.46

Finding the Fourth Proportional to 639,327.90, 882,386.88 and 381,221.46

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Solution

The fourth proportional to 639,327.90, 882,386.88 and 381,221.46 is: 526,153.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,327.90 : 882,386.88 = 381,221.46 : x
  2. Step 2: Convert to fraction form
    639,327.90/882,386.88 = 381,221.46/x
  3. Step 3: Cross multiply
    639,327.90x = 882,386.88 × 381,221.46
  4. Step 4: Simplify right side
    639,327.90x = 336,384,814,678.45
  5. Step 5: Solve for x
    x = 336,384,814,678.45/639,327.90
  6. Step 6: Final answer
    x = 526,153.82

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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.