Home / 1,290,315.81-1,778,009.90-998,152.66

Finding the Fourth Proportional to 1,290,315.81, 1,778,009.90 and 998,152.66

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Solution

The fourth proportional to 1,290,315.81, 1,778,009.90 and 998,152.66 is: 1,375,419.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,315.81 : 1,778,009.90 = 998,152.66 : x
  2. Step 2: Convert to fraction form
    1,290,315.81/1,778,009.90 = 998,152.66/x
  3. Step 3: Cross multiply
    1,290,315.81x = 1,778,009.90 × 998,152.66
  4. Step 4: Simplify right side
    1,290,315.81x = 1,774,725,311,191.33
  5. Step 5: Solve for x
    x = 1,774,725,311,191.33/1,290,315.81
  6. Step 6: Final answer
    x = 1,375,419.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.