Home / 999,318.91-1,379,139.54-636,905.47

Finding the Fourth Proportional to 999,318.91, 1,379,139.54 and 636,905.47

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Solution

The fourth proportional to 999,318.91, 1,379,139.54 and 636,905.47 is: 878,980.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,318.91 : 1,379,139.54 = 636,905.47 : x
  2. Step 2: Convert to fraction form
    999,318.91/1,379,139.54 = 636,905.47/x
  3. Step 3: Cross multiply
    999,318.91x = 1,379,139.54 × 636,905.47
  4. Step 4: Simplify right side
    999,318.91x = 878,381,516,919.28
  5. Step 5: Solve for x
    x = 878,381,516,919.28/999,318.91
  6. Step 6: Final answer
    x = 878,980.18

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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.