Home / 1,405,888.20-2,103,917.10-1,287,923.40

Finding the Fourth Proportional to 1,405,888.20, 2,103,917.10 and 1,287,923.40

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Solution

The fourth proportional to 1,405,888.20, 2,103,917.10 and 1,287,923.40 is: 1,927,382.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405,888.20 : 2,103,917.10 = 1,287,923.40 : x
  2. Step 2: Convert to fraction form
    1,405,888.20/2,103,917.10 = 1,287,923.40/x
  3. Step 3: Cross multiply
    1,405,888.20x = 2,103,917.10 × 1,287,923.40
  4. Step 4: Simplify right side
    1,405,888.20x = 2,709,684,064,750.14
  5. Step 5: Solve for x
    x = 2,709,684,064,750.14/1,405,888.20
  6. Step 6: Final answer
    x = 1,927,382.32

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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.