Home / 1,288,126.40-1,932,189.60-990,111.20

Finding the Fourth Proportional to 1,288,126.40, 1,932,189.60 and 990,111.20

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Solution

The fourth proportional to 1,288,126.40, 1,932,189.60 and 990,111.20 is: 1,485,166.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,126.40 : 1,932,189.60 = 990,111.20 : x
  2. Step 2: Convert to fraction form
    1,288,126.40/1,932,189.60 = 990,111.20/x
  3. Step 3: Cross multiply
    1,288,126.40x = 1,932,189.60 × 990,111.20
  4. Step 4: Simplify right side
    1,288,126.40x = 1,913,082,563,483.52
  5. Step 5: Solve for x
    x = 1,913,082,563,483.52/1,288,126.40
  6. Step 6: Final answer
    x = 1,485,166.80

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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.