Home / 1,390,904.40-2,086,356.60-856,693.20

Finding the Fourth Proportional to 1,390,904.40, 2,086,356.60 and 856,693.20

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Solution

The fourth proportional to 1,390,904.40, 2,086,356.60 and 856,693.20 is: 1,285,039.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,904.40 : 2,086,356.60 = 856,693.20 : x
  2. Step 2: Convert to fraction form
    1,390,904.40/2,086,356.60 = 856,693.20/x
  3. Step 3: Cross multiply
    1,390,904.40x = 2,086,356.60 × 856,693.20
  4. Step 4: Simplify right side
    1,390,904.40x = 1,787,367,511,995.12
  5. Step 5: Solve for x
    x = 1,787,367,511,995.12/1,390,904.40
  6. Step 6: Final answer
    x = 1,285,039.80

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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.