Home / 1,278,684,815,421.40-1,918,145,125,120-418,163,448,514.56

Finding the Fourth Proportional to 1,278,684,815,421.40, 1,918,145,125,120 and 418,163,448,514.56

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Solution

The fourth proportional to 1,278,684,815,421.40, 1,918,145,125,120 and 418,163,448,514.56 is: 627,283,729,812.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,684,815,421.40 : 1,918,145,125,120 = 418,163,448,514.56 : x
  2. Step 2: Convert to fraction form
    1,278,684,815,421.40/1,918,145,125,120 = 418,163,448,514.56/x
  3. Step 3: Cross multiply
    1,278,684,815,421.40x = 1,918,145,125,120 × 418,163,448,514.56
  4. Step 4: Simplify right side
    1,278,684,815,421.40x = 802,098,180,271,571,300,515,840
  5. Step 5: Solve for x
    x = 802,098,180,271,571,300,515,840/1,278,684,815,421.40
  6. Step 6: Final answer
    x = 627,283,729,812.05

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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.