Home / 1,390,907.20-2,088,329.10-1,091,725.60

Finding the Fourth Proportional to 1,390,907.20, 2,088,329.10 and 1,091,725.60

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Solution

The fourth proportional to 1,390,907.20, 2,088,329.10 and 1,091,725.60 is: 1,639,133.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,907.20 : 2,088,329.10 = 1,091,725.60 : x
  2. Step 2: Convert to fraction form
    1,390,907.20/2,088,329.10 = 1,091,725.60/x
  3. Step 3: Cross multiply
    1,390,907.20x = 2,088,329.10 × 1,091,725.60
  4. Step 4: Simplify right side
    1,390,907.20x = 2,279,882,339,694.96
  5. Step 5: Solve for x
    x = 2,279,882,339,694.96/1,390,907.20
  6. Step 6: Final answer
    x = 1,639,133.32

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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.