Home / 1,438,784.20-2,159,342.70-1,392,128.20

Finding the Fourth Proportional to 1,438,784.20, 2,159,342.70 and 1,392,128.20

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Solution

The fourth proportional to 1,438,784.20, 2,159,342.70 and 1,392,128.20 is: 2,089,320.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438,784.20 : 2,159,342.70 = 1,392,128.20 : x
  2. Step 2: Convert to fraction form
    1,438,784.20/2,159,342.70 = 1,392,128.20/x
  3. Step 3: Cross multiply
    1,438,784.20x = 2,159,342.70 × 1,392,128.20
  4. Step 4: Simplify right side
    1,438,784.20x = 3,006,081,866,134.14
  5. Step 5: Solve for x
    x = 3,006,081,866,134.14/1,438,784.20
  6. Step 6: Final answer
    x = 2,089,320.88

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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.