Home / 1,290,155.21-1,780,459.89-709,422.57

Finding the Fourth Proportional to 1,290,155.21, 1,780,459.89 and 709,422.57

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Solution

The fourth proportional to 1,290,155.21, 1,780,459.89 and 709,422.57 is: 979,028.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,155.21 : 1,780,459.89 = 709,422.57 : x
  2. Step 2: Convert to fraction form
    1,290,155.21/1,780,459.89 = 709,422.57/x
  3. Step 3: Cross multiply
    1,290,155.21x = 1,780,459.89 × 709,422.57
  4. Step 4: Simplify right side
    1,290,155.21x = 1,263,098,428,285.38
  5. Step 5: Solve for x
    x = 1,263,098,428,285.38/1,290,155.21
  6. Step 6: Final answer
    x = 979,028.27

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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.