Home / 1,290,420.71-1,935,634.14-391,869.20

Finding the Fourth Proportional to 1,290,420.71, 1,935,634.14 and 391,869.20

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Solution

The fourth proportional to 1,290,420.71, 1,935,634.14 and 391,869.20 is: 587,804.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,420.71 : 1,935,634.14 = 391,869.20 : x
  2. Step 2: Convert to fraction form
    1,290,420.71/1,935,634.14 = 391,869.20/x
  3. Step 3: Cross multiply
    1,290,420.71x = 1,935,634.14 × 391,869.20
  4. Step 4: Simplify right side
    1,290,420.71x = 758,515,399,975.14
  5. Step 5: Solve for x
    x = 758,515,399,975.14/1,290,420.71
  6. Step 6: Final answer
    x = 587,804.73

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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.