Home / 1,259,710.80-1,889,566.20-780,320.40

Finding the Fourth Proportional to 1,259,710.80, 1,889,566.20 and 780,320.40

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Solution

The fourth proportional to 1,259,710.80, 1,889,566.20 and 780,320.40 is: 1,170,480.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,259,710.80 : 1,889,566.20 = 780,320.40 : x
  2. Step 2: Convert to fraction form
    1,259,710.80/1,889,566.20 = 780,320.40/x
  3. Step 3: Cross multiply
    1,259,710.80x = 1,889,566.20 × 780,320.40
  4. Step 4: Simplify right side
    1,259,710.80x = 1,474,467,053,010.48
  5. Step 5: Solve for x
    x = 1,474,467,053,010.48/1,259,710.80
  6. Step 6: Final answer
    x = 1,170,480.60

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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.