Home / 1,242,844,420.50-1,715,100,988.86-678,333,348.68

Finding the Fourth Proportional to 1,242,844,420.50, 1,715,100,988.86 and 678,333,348.68

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Solution

The fourth proportional to 1,242,844,420.50, 1,715,100,988.86 and 678,333,348.68 is: 936,086,752.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242,844,420.50 : 1,715,100,988.86 = 678,333,348.68 : x
  2. Step 2: Convert to fraction form
    1,242,844,420.50/1,715,100,988.86 = 678,333,348.68/x
  3. Step 3: Cross multiply
    1,242,844,420.50x = 1,715,100,988.86 × 678,333,348.68
  4. Step 4: Simplify right side
    1,242,844,420.50x = 1,163,410,197,089,207,552
  5. Step 5: Solve for x
    x = 1,163,410,197,089,207,552/1,242,844,420.50
  6. Step 6: Final answer
    x = 936,086,752.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.