Home / 1,990,116-2,985,640.56-660,420

Finding the Fourth Proportional to 1,990,116, 2,985,640.56 and 660,420

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Solution

The fourth proportional to 1,990,116, 2,985,640.56 and 660,420 is: 990,784.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990,116 : 2,985,640.56 = 660,420 : x
  2. Step 2: Convert to fraction form
    1,990,116/2,985,640.56 = 660,420/x
  3. Step 3: Cross multiply
    1,990,116x = 2,985,640.56 × 660,420
  4. Step 4: Simplify right side
    1,990,116x = 1,971,776,738,635.20
  5. Step 5: Solve for x
    x = 1,971,776,738,635.20/1,990,116
  6. Step 6: Final answer
    x = 990,784.83

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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.