Home / 1,242,844,421-1,715,100,989.55-678,333,349.18

Finding the Fourth Proportional to 1,242,844,421, 1,715,100,989.55 and 678,333,349.18

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Solution

The fourth proportional to 1,242,844,421, 1,715,100,989.55 and 678,333,349.18 is: 936,086,752.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242,844,421 : 1,715,100,989.55 = 678,333,349.18 : x
  2. Step 2: Convert to fraction form
    1,242,844,421/1,715,100,989.55 = 678,333,349.18/x
  3. Step 3: Cross multiply
    1,242,844,421x = 1,715,100,989.55 × 678,333,349.18
  4. Step 4: Simplify right side
    1,242,844,421x = 1,163,410,198,414,808,064
  5. Step 5: Solve for x
    x = 1,163,410,198,414,808,064/1,242,844,421
  6. Step 6: Final answer
    x = 936,086,752.90

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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.