Home / 1,218,209.31-1,681,132.70-659,403.63

Finding the Fourth Proportional to 1,218,209.31, 1,681,132.70 and 659,403.63

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Solution

The fourth proportional to 1,218,209.31, 1,681,132.70 and 659,403.63 is: 909,979.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218,209.31 : 1,681,132.70 = 659,403.63 : x
  2. Step 2: Convert to fraction form
    1,218,209.31/1,681,132.70 = 659,403.63/x
  3. Step 3: Cross multiply
    1,218,209.31x = 1,681,132.70 × 659,403.63
  4. Step 4: Simplify right side
    1,218,209.31x = 1,108,545,001,594.68
  5. Step 5: Solve for x
    x = 1,108,545,001,594.68/1,218,209.31
  6. Step 6: Final answer
    x = 909,979.09

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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.