Home / 1,289,514.68-1,778,978.20-805,239.07

Finding the Fourth Proportional to 1,289,514.68, 1,778,978.20 and 805,239.07

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Solution

The fourth proportional to 1,289,514.68, 1,778,978.20 and 805,239.07 is: 1,110,885.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289,514.68 : 1,778,978.20 = 805,239.07 : x
  2. Step 2: Convert to fraction form
    1,289,514.68/1,778,978.20 = 805,239.07/x
  3. Step 3: Cross multiply
    1,289,514.68x = 1,778,978.20 × 805,239.07
  4. Step 4: Simplify right side
    1,289,514.68x = 1,432,502,751,318.27
  5. Step 5: Solve for x
    x = 1,432,502,751,318.27/1,289,514.68
  6. Step 6: Final answer
    x = 1,110,885.18

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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.