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Finding the Fourth Proportional to 289,363.60, 434,087.68 and 139,480.63

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Solution

The fourth proportional to 289,363.60, 434,087.68 and 139,480.63 is: 209,241.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,363.60 : 434,087.68 = 139,480.63 : x
  2. Step 2: Convert to fraction form
    289,363.60/434,087.68 = 139,480.63/x
  3. Step 3: Cross multiply
    289,363.60x = 434,087.68 × 139,480.63
  4. Step 4: Simplify right side
    289,363.60x = 60,546,823,081.64
  5. Step 5: Solve for x
    x = 60,546,823,081.64/289,363.60
  6. Step 6: Final answer
    x = 209,241.33

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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.