Home / 1,638,989.30-2,261,531.12-913,678.04

Finding the Fourth Proportional to 1,638,989.30, 2,261,531.12 and 913,678.04

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Solution

The fourth proportional to 1,638,989.30, 2,261,531.12 and 913,678.04 is: 1,260,722.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638,989.30 : 2,261,531.12 = 913,678.04 : x
  2. Step 2: Convert to fraction form
    1,638,989.30/2,261,531.12 = 913,678.04/x
  3. Step 3: Cross multiply
    1,638,989.30x = 2,261,531.12 × 913,678.04
  4. Step 4: Simplify right side
    1,638,989.30x = 2,066,311,321,120.61
  5. Step 5: Solve for x
    x = 2,066,311,321,120.61/1,638,989.30
  6. Step 6: Final answer
    x = 1,260,722.89

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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.