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Finding the Fourth Proportional to 1,339,899.60, 2,009,849.40 and 808,458.60

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Solution

The fourth proportional to 1,339,899.60, 2,009,849.40 and 808,458.60 is: 1,212,687.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,339,899.60 : 2,009,849.40 = 808,458.60 : x
  2. Step 2: Convert to fraction form
    1,339,899.60/2,009,849.40 = 808,458.60/x
  3. Step 3: Cross multiply
    1,339,899.60x = 2,009,849.40 × 808,458.60
  4. Step 4: Simplify right side
    1,339,899.60x = 1,624,880,032,134.84
  5. Step 5: Solve for x
    x = 1,624,880,032,134.84/1,339,899.60
  6. Step 6: Final answer
    x = 1,212,687.90

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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.