Home / 1,290,163.47-1,780,471.29-709,430.82

Finding the Fourth Proportional to 1,290,163.47, 1,780,471.29 and 709,430.82

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Solution

The fourth proportional to 1,290,163.47, 1,780,471.29 and 709,430.82 is: 979,039.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,163.47 : 1,780,471.29 = 709,430.82 : x
  2. Step 2: Convert to fraction form
    1,290,163.47/1,780,471.29 = 709,430.82/x
  3. Step 3: Cross multiply
    1,290,163.47x = 1,780,471.29 × 709,430.82
  4. Step 4: Simplify right side
    1,290,163.47x = 1,263,121,207,251.16
  5. Step 5: Solve for x
    x = 1,263,121,207,251.16/1,290,163.47
  6. Step 6: Final answer
    x = 979,039.66

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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.