Home / 1,325,509,123.40-1,987,944,820.40-405,393,433.64

Finding the Fourth Proportional to 1,325,509,123.40, 1,987,944,820.40 and 405,393,433.64

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Solution

The fourth proportional to 1,325,509,123.40, 1,987,944,820.40 and 405,393,433.64 is: 607,992,628.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325,509,123.40 : 1,987,944,820.40 = 405,393,433.64 : x
  2. Step 2: Convert to fraction form
    1,325,509,123.40/1,987,944,820.40 = 405,393,433.64/x
  3. Step 3: Cross multiply
    1,325,509,123.40x = 1,987,944,820.40 × 405,393,433.64
  4. Step 4: Simplify right side
    1,325,509,123.40x = 805,899,776,628,809,088
  5. Step 5: Solve for x
    x = 805,899,776,628,809,088/1,325,509,123.40
  6. Step 6: Final answer
    x = 607,992,628.95

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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.