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Finding the Fourth Proportional to 646,648.56, 892,339.56 and 356,203.20

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Solution

The fourth proportional to 646,648.56, 892,339.56 and 356,203.20 is: 491,540.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,648.56 : 892,339.56 = 356,203.20 : x
  2. Step 2: Convert to fraction form
    646,648.56/892,339.56 = 356,203.20/x
  3. Step 3: Cross multiply
    646,648.56x = 892,339.56 × 356,203.20
  4. Step 4: Simplify right side
    646,648.56x = 317,854,206,758.59
  5. Step 5: Solve for x
    x = 317,854,206,758.59/646,648.56
  6. Step 6: Final answer
    x = 491,540.89

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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.