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Finding the Fourth Proportional to 1,339,569.60, 2,009,575.80 and 620,629.80

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Solution

The fourth proportional to 1,339,569.60, 2,009,575.80 and 620,629.80 is: 931,047.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,339,569.60 : 2,009,575.80 = 620,629.80 : x
  2. Step 2: Convert to fraction form
    1,339,569.60/2,009,575.80 = 620,629.80/x
  3. Step 3: Cross multiply
    1,339,569.60x = 2,009,575.80 × 620,629.80
  4. Step 4: Simplify right side
    1,339,569.60x = 1,247,202,626,838.84
  5. Step 5: Solve for x
    x = 1,247,202,626,838.84/1,339,569.60
  6. Step 6: Final answer
    x = 931,047.28

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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.