Home / 999,317.91-1,379,138.16-636,904.47

Finding the Fourth Proportional to 999,317.91, 1,379,138.16 and 636,904.47

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Solution

The fourth proportional to 999,317.91, 1,379,138.16 and 636,904.47 is: 878,978.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,317.91 : 1,379,138.16 = 636,904.47 : x
  2. Step 2: Convert to fraction form
    999,317.91/1,379,138.16 = 636,904.47/x
  3. Step 3: Cross multiply
    999,317.91x = 1,379,138.16 × 636,904.47
  4. Step 4: Simplify right side
    999,317.91x = 878,379,258,851.58
  5. Step 5: Solve for x
    x = 878,379,258,851.58/999,317.91
  6. Step 6: Final answer
    x = 878,978.80

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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.