Home / 1,290,531.90-1,780,954.38-709,780.26

Finding the Fourth Proportional to 1,290,531.90, 1,780,954.38 and 709,780.26

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Solution

The fourth proportional to 1,290,531.90, 1,780,954.38 and 709,780.26 is: 979,507.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,531.90 : 1,780,954.38 = 709,780.26 : x
  2. Step 2: Convert to fraction form
    1,290,531.90/1,780,954.38 = 709,780.26/x
  3. Step 3: Cross multiply
    1,290,531.90x = 1,780,954.38 × 709,780.26
  4. Step 4: Simplify right side
    1,290,531.90x = 1,264,086,262,884.54
  5. Step 5: Solve for x
    x = 1,264,086,262,884.54/1,290,531.90
  6. Step 6: Final answer
    x = 979,507.96

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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.