Home / 1,326,490.80-1,990,513.80-485,127.60

Finding the Fourth Proportional to 1,326,490.80, 1,990,513.80 and 485,127.60

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Solution

The fourth proportional to 1,326,490.80, 1,990,513.80 and 485,127.60 is: 727,975.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326,490.80 : 1,990,513.80 = 485,127.60 : x
  2. Step 2: Convert to fraction form
    1,326,490.80/1,990,513.80 = 485,127.60/x
  3. Step 3: Cross multiply
    1,326,490.80x = 1,990,513.80 × 485,127.60
  4. Step 4: Simplify right side
    1,326,490.80x = 965,653,182,560.88
  5. Step 5: Solve for x
    x = 965,653,182,560.88/1,326,490.80
  6. Step 6: Final answer
    x = 727,975.79

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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.