Home / 1,392,772.59-1,921,318.78-909,620.55

Finding the Fourth Proportional to 1,392,772.59, 1,921,318.78 and 909,620.55

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Solution

The fourth proportional to 1,392,772.59, 1,921,318.78 and 909,620.55 is: 1,254,814.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392,772.59 : 1,921,318.78 = 909,620.55 : x
  2. Step 2: Convert to fraction form
    1,392,772.59/1,921,318.78 = 909,620.55/x
  3. Step 3: Cross multiply
    1,392,772.59x = 1,921,318.78 × 909,620.55
  4. Step 4: Simplify right side
    1,392,772.59x = 1,747,671,045,388.93
  5. Step 5: Solve for x
    x = 1,747,671,045,388.93/1,392,772.59
  6. Step 6: Final answer
    x = 1,254,814.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.