Home / 1,290,260.78-1,780,459-717,266.06

Finding the Fourth Proportional to 1,290,260.78, 1,780,459 and 717,266.06

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Solution

The fourth proportional to 1,290,260.78, 1,780,459 and 717,266.06 is: 989,771.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,260.78 : 1,780,459 = 717,266.06 : x
  2. Step 2: Convert to fraction form
    1,290,260.78/1,780,459 = 717,266.06/x
  3. Step 3: Cross multiply
    1,290,260.78x = 1,780,459 × 717,266.06
  4. Step 4: Simplify right side
    1,290,260.78x = 1,277,062,811,921.54
  5. Step 5: Solve for x
    x = 1,277,062,811,921.54/1,290,260.78
  6. Step 6: Final answer
    x = 989,771.08

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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.