Home / 1,115,811.72-1,674,430.38-405,772.20

Finding the Fourth Proportional to 1,115,811.72, 1,674,430.38 and 405,772.20

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Solution

The fourth proportional to 1,115,811.72, 1,674,430.38 and 405,772.20 is: 608,917.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115,811.72 : 1,674,430.38 = 405,772.20 : x
  2. Step 2: Convert to fraction form
    1,115,811.72/1,674,430.38 = 405,772.20/x
  3. Step 3: Cross multiply
    1,115,811.72x = 1,674,430.38 × 405,772.20
  4. Step 4: Simplify right side
    1,115,811.72x = 679,437,299,039.44
  5. Step 5: Solve for x
    x = 679,437,299,039.44/1,115,811.72
  6. Step 6: Final answer
    x = 608,917.51

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Double scale
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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.