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Finding the Fourth Proportional to 1,212,903.70, 1,815,856.35 and 1,212,903.70

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Solution

The fourth proportional to 1,212,903.70, 1,815,856.35 and 1,212,903.70 is: 1,815,856.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212,903.70 : 1,815,856.35 = 1,212,903.70 : x
  2. Step 2: Convert to fraction form
    1,212,903.70/1,815,856.35 = 1,212,903.70/x
  3. Step 3: Cross multiply
    1,212,903.70x = 1,815,856.35 × 1,212,903.70
  4. Step 4: Simplify right side
    1,212,903.70x = 2,202,458,885,583.50
  5. Step 5: Solve for x
    x = 2,202,458,885,583.50/1,212,903.70
  6. Step 6: Final answer
    x = 1,815,856.35

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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.