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Finding the Fourth Proportional to 445,442.10, 668,163.15 and 209,246.10

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Solution

The fourth proportional to 445,442.10, 668,163.15 and 209,246.10 is: 313,869.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,442.10 : 668,163.15 = 209,246.10 : x
  2. Step 2: Convert to fraction form
    445,442.10/668,163.15 = 209,246.10/x
  3. Step 3: Cross multiply
    445,442.10x = 668,163.15 × 209,246.10
  4. Step 4: Simplify right side
    445,442.10x = 139,810,533,301.22
  5. Step 5: Solve for x
    x = 139,810,533,301.22/445,442.10
  6. Step 6: Final answer
    x = 313,869.15

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.