Home / 685,136,607.86-945,326,451.06-387,778,850.12

Finding the Fourth Proportional to 685,136,607.86, 945,326,451.06 and 387,778,850.12

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Solution

The fourth proportional to 685,136,607.86, 945,326,451.06 and 387,778,850.12 is: 535,043,084.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,136,607.86 : 945,326,451.06 = 387,778,850.12 : x
  2. Step 2: Convert to fraction form
    685,136,607.86/945,326,451.06 = 387,778,850.12/x
  3. Step 3: Cross multiply
    685,136,607.86x = 945,326,451.06 × 387,778,850.12
  4. Step 4: Simplify right side
    685,136,607.86x = 366,577,604,175,340,608
  5. Step 5: Solve for x
    x = 366,577,604,175,340,608/685,136,607.86
  6. Step 6: Final answer
    x = 535,043,084.80

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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.