Home / 1,279,420.40-1,919,389.80-438,057.20

Finding the Fourth Proportional to 1,279,420.40, 1,919,389.80 and 438,057.20

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Solution

The fourth proportional to 1,279,420.40, 1,919,389.80 and 438,057.20 is: 657,174.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,420.40 : 1,919,389.80 = 438,057.20 : x
  2. Step 2: Convert to fraction form
    1,279,420.40/1,919,389.80 = 438,057.20/x
  3. Step 3: Cross multiply
    1,279,420.40x = 1,919,389.80 × 438,057.20
  4. Step 4: Simplify right side
    1,279,420.40x = 840,802,521,496.56
  5. Step 5: Solve for x
    x = 840,802,521,496.56/1,279,420.40
  6. Step 6: Final answer
    x = 657,174.55

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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.