Home / 1,290,421.15-1,935,634.79-391,869.64

Finding the Fourth Proportional to 1,290,421.15, 1,935,634.79 and 391,869.64

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Solution

The fourth proportional to 1,290,421.15, 1,935,634.79 and 391,869.64 is: 587,805.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,421.15 : 1,935,634.79 = 391,869.64 : x
  2. Step 2: Convert to fraction form
    1,290,421.15/1,935,634.79 = 391,869.64/x
  3. Step 3: Cross multiply
    1,290,421.15x = 1,935,634.79 × 391,869.64
  4. Step 4: Simplify right side
    1,290,421.15x = 758,516,508,098.68
  5. Step 5: Solve for x
    x = 758,516,508,098.68/1,290,421.15
  6. Step 6: Final answer
    x = 587,805.39

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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.