Home / 1,290,390.66-1,935,460.83-391,840.17

Finding the Fourth Proportional to 1,290,390.66, 1,935,460.83 and 391,840.17

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Solution

The fourth proportional to 1,290,390.66, 1,935,460.83 and 391,840.17 is: 587,722.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,390.66 : 1,935,460.83 = 391,840.17 : x
  2. Step 2: Convert to fraction form
    1,290,390.66/1,935,460.83 = 391,840.17/x
  3. Step 3: Cross multiply
    1,290,390.66x = 1,935,460.83 × 391,840.17
  4. Step 4: Simplify right side
    1,290,390.66x = 758,391,300,655.54
  5. Step 5: Solve for x
    x = 758,391,300,655.54/1,290,390.66
  6. Step 6: Final answer
    x = 587,722.25

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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.