Home / 287,712,019.20-431,568,028.80-190,777,180.80

Finding the Fourth Proportional to 287,712,019.20, 431,568,028.80 and 190,777,180.80

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Solution

The fourth proportional to 287,712,019.20, 431,568,028.80 and 190,777,180.80 is: 286,165,771.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,712,019.20 : 431,568,028.80 = 190,777,180.80 : x
  2. Step 2: Convert to fraction form
    287,712,019.20/431,568,028.80 = 190,777,180.80/x
  3. Step 3: Cross multiply
    287,712,019.20x = 431,568,028.80 × 190,777,180.80
  4. Step 4: Simplify right side
    287,712,019.20x = 82,333,331,857,877,216
  5. Step 5: Solve for x
    x = 82,333,331,857,877,216/287,712,019.20
  6. Step 6: Final answer
    x = 286,165,771.20

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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.