Home / 1,392,308.61-1,921,503.41-780,451.62

Finding the Fourth Proportional to 1,392,308.61, 1,921,503.41 and 780,451.62

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Solution

The fourth proportional to 1,392,308.61, 1,921,503.41 and 780,451.62 is: 1,077,089.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392,308.61 : 1,921,503.41 = 780,451.62 : x
  2. Step 2: Convert to fraction form
    1,392,308.61/1,921,503.41 = 780,451.62/x
  3. Step 3: Cross multiply
    1,392,308.61x = 1,921,503.41 × 780,451.62
  4. Step 4: Simplify right side
    1,392,308.61x = 1,499,640,449,170.02
  5. Step 5: Solve for x
    x = 1,499,640,449,170.02/1,392,308.61
  6. Step 6: Final answer
    x = 1,077,089.12

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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.