Home / 1,390,304,005.20-2,085,735,943.80-407,728,645.20

Finding the Fourth Proportional to 1,390,304,005.20, 2,085,735,943.80 and 407,728,645.20

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Solution

The fourth proportional to 1,390,304,005.20, 2,085,735,943.80 and 407,728,645.20 is: 611,675,063.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,304,005.20 : 2,085,735,943.80 = 407,728,645.20 : x
  2. Step 2: Convert to fraction form
    1,390,304,005.20/2,085,735,943.80 = 407,728,645.20/x
  3. Step 3: Cross multiply
    1,390,304,005.20x = 2,085,735,943.80 × 407,728,645.20
  4. Step 4: Simplify right side
    1,390,304,005.20x = 850,414,290,610,517,248
  5. Step 5: Solve for x
    x = 850,414,290,610,517,248/1,390,304,005.20
  6. Step 6: Final answer
    x = 611,675,063.46

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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.