Home / 1,290,050.47-1,780,289.42-709,298.78

Finding the Fourth Proportional to 1,290,050.47, 1,780,289.42 and 709,298.78

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Solution

The fourth proportional to 1,290,050.47, 1,780,289.42 and 709,298.78 is: 978,843.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,050.47 : 1,780,289.42 = 709,298.78 : x
  2. Step 2: Convert to fraction form
    1,290,050.47/1,780,289.42 = 709,298.78/x
  3. Step 3: Cross multiply
    1,290,050.47x = 1,780,289.42 × 709,298.78
  4. Step 4: Simplify right side
    1,290,050.47x = 1,262,757,104,197.29
  5. Step 5: Solve for x
    x = 1,262,757,104,197.29/1,290,050.47
  6. Step 6: Final answer
    x = 978,843.18

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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.