Home / 1,218,260.78-1,681,219.76-666,967.25

Finding the Fourth Proportional to 1,218,260.78, 1,681,219.76 and 666,967.25

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Solution

The fourth proportional to 1,218,260.78, 1,681,219.76 and 666,967.25 is: 920,425.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218,260.78 : 1,681,219.76 = 666,967.25 : x
  2. Step 2: Convert to fraction form
    1,218,260.78/1,681,219.76 = 666,967.25/x
  3. Step 3: Cross multiply
    1,218,260.78x = 1,681,219.76 × 666,967.25
  4. Step 4: Simplify right side
    1,218,260.78x = 1,121,318,524,622.75
  5. Step 5: Solve for x
    x = 1,121,318,524,622.75/1,218,260.78
  6. Step 6: Final answer
    x = 920,425.69

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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.