Home / 1,278,078.88-1,917,302.64-391,684

Finding the Fourth Proportional to 1,278,078.88, 1,917,302.64 and 391,684

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Solution

The fourth proportional to 1,278,078.88, 1,917,302.64 and 391,684 is: 587,582.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,078.88 : 1,917,302.64 = 391,684 : x
  2. Step 2: Convert to fraction form
    1,278,078.88/1,917,302.64 = 391,684/x
  3. Step 3: Cross multiply
    1,278,078.88x = 1,917,302.64 × 391,684
  4. Step 4: Simplify right side
    1,278,078.88x = 750,976,767,245.76
  5. Step 5: Solve for x
    x = 750,976,767,245.76/1,278,078.88
  6. Step 6: Final answer
    x = 587,582.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.