Home / 618,821,666.42-853,990,055.25-340,370,495.78

Finding the Fourth Proportional to 618,821,666.42, 853,990,055.25 and 340,370,495.78

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Solution

The fourth proportional to 618,821,666.42, 853,990,055.25 and 340,370,495.78 is: 469,720,170.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,821,666.42 : 853,990,055.25 = 340,370,495.78 : x
  2. Step 2: Convert to fraction form
    618,821,666.42/853,990,055.25 = 340,370,495.78/x
  3. Step 3: Cross multiply
    618,821,666.42x = 853,990,055.25 × 340,370,495.78
  4. Step 4: Simplify right side
    618,821,666.42x = 290,673,018,496,632,064
  5. Step 5: Solve for x
    x = 290,673,018,496,632,064/618,821,666.42
  6. Step 6: Final answer
    x = 469,720,170.24

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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.