Home / 287,395,429.20-431,093,143.80-270,389,317.20

Finding the Fourth Proportional to 287,395,429.20, 431,093,143.80 and 270,389,317.20

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Solution

The fourth proportional to 287,395,429.20, 431,093,143.80 and 270,389,317.20 is: 405,583,975.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,395,429.20 : 431,093,143.80 = 270,389,317.20 : x
  2. Step 2: Convert to fraction form
    287,395,429.20/431,093,143.80 = 270,389,317.20/x
  3. Step 3: Cross multiply
    287,395,429.20x = 431,093,143.80 × 270,389,317.20
  4. Step 4: Simplify right side
    287,395,429.20x = 116,562,980,801,683,408
  5. Step 5: Solve for x
    x = 116,562,980,801,683,408/287,395,429.20
  6. Step 6: Final answer
    x = 405,583,975.80

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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.