Home / 1,320,705.68-1,980,961.60-421,906.04

Finding the Fourth Proportional to 1,320,705.68, 1,980,961.60 and 421,906.04

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Solution

The fourth proportional to 1,320,705.68, 1,980,961.60 and 421,906.04 is: 632,828.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,705.68 : 1,980,961.60 = 421,906.04 : x
  2. Step 2: Convert to fraction form
    1,320,705.68/1,980,961.60 = 421,906.04/x
  3. Step 3: Cross multiply
    1,320,705.68x = 1,980,961.60 × 421,906.04
  4. Step 4: Simplify right side
    1,320,705.68x = 835,779,664,048.06
  5. Step 5: Solve for x
    x = 835,779,664,048.06/1,320,705.68
  6. Step 6: Final answer
    x = 632,828.10

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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.