Home / 1,222,187.76-1,686,637.44-678,358.80

Finding the Fourth Proportional to 1,222,187.76, 1,686,637.44 and 678,358.80

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Solution

The fourth proportional to 1,222,187.76, 1,686,637.44 and 678,358.80 is: 936,145.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222,187.76 : 1,686,637.44 = 678,358.80 : x
  2. Step 2: Convert to fraction form
    1,222,187.76/1,686,637.44 = 678,358.80/x
  3. Step 3: Cross multiply
    1,222,187.76x = 1,686,637.44 × 678,358.80
  4. Step 4: Simplify right side
    1,222,187.76x = 1,144,145,349,833.47
  5. Step 5: Solve for x
    x = 1,144,145,349,833.47/1,222,187.76
  6. Step 6: Final answer
    x = 936,145.32

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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.