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Finding the Fourth Proportional to 1,052,765.70, 1,579,148.55 and 919,905.45

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Solution

The fourth proportional to 1,052,765.70, 1,579,148.55 and 919,905.45 is: 1,379,858.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,052,765.70 : 1,579,148.55 = 919,905.45 : x
  2. Step 2: Convert to fraction form
    1,052,765.70/1,579,148.55 = 919,905.45/x
  3. Step 3: Cross multiply
    1,052,765.70x = 1,579,148.55 × 919,905.45
  4. Step 4: Simplify right side
    1,052,765.70x = 1,452,667,357,504.60
  5. Step 5: Solve for x
    x = 1,452,667,357,504.60/1,052,765.70
  6. Step 6: Final answer
    x = 1,379,858.18

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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.