Home / 999,316.91-1,379,136.78-636,903.47

Finding the Fourth Proportional to 999,316.91, 1,379,136.78 and 636,903.47

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Solution

The fourth proportional to 999,316.91, 1,379,136.78 and 636,903.47 is: 878,977.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,316.91 : 1,379,136.78 = 636,903.47 : x
  2. Step 2: Convert to fraction form
    999,316.91/1,379,136.78 = 636,903.47/x
  3. Step 3: Cross multiply
    999,316.91x = 1,379,136.78 × 636,903.47
  4. Step 4: Simplify right side
    999,316.91x = 878,376,997,602.11
  5. Step 5: Solve for x
    x = 878,376,997,602.11/999,316.91
  6. Step 6: Final answer
    x = 878,977.42

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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.