Home / 1,987,131.80-2,979,239.70-788,461.40

Finding the Fourth Proportional to 1,987,131.80, 2,979,239.70 and 788,461.40

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Solution

The fourth proportional to 1,987,131.80, 2,979,239.70 and 788,461.40 is: 1,182,113.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987,131.80 : 2,979,239.70 = 788,461.40 : x
  2. Step 2: Convert to fraction form
    1,987,131.80/2,979,239.70 = 788,461.40/x
  3. Step 3: Cross multiply
    1,987,131.80x = 2,979,239.70 × 788,461.40
  4. Step 4: Simplify right side
    1,987,131.80x = 2,349,015,504,797.58
  5. Step 5: Solve for x
    x = 2,349,015,504,797.58/1,987,131.80
  6. Step 6: Final answer
    x = 1,182,113.59

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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.