Home / 1,290,173.49-1,780,485.12-709,440.69

Finding the Fourth Proportional to 1,290,173.49, 1,780,485.12 and 709,440.69

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Solution

The fourth proportional to 1,290,173.49, 1,780,485.12 and 709,440.69 is: 979,053.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,173.49 : 1,780,485.12 = 709,440.69 : x
  2. Step 2: Convert to fraction form
    1,290,173.49/1,780,485.12 = 709,440.69/x
  3. Step 3: Cross multiply
    1,290,173.49x = 1,780,485.12 × 709,440.69
  4. Step 4: Simplify right side
    1,290,173.49x = 1,263,148,592,067.53
  5. Step 5: Solve for x
    x = 1,263,148,592,067.53/1,290,173.49
  6. Step 6: Final answer
    x = 979,053.28

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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.