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Finding the Fourth Proportional to 720,876.42, 1,081,379.22 and 208,533.51

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Solution

The fourth proportional to 720,876.42, 1,081,379.22 and 208,533.51 is: 312,818.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,876.42 : 1,081,379.22 = 208,533.51 : x
  2. Step 2: Convert to fraction form
    720,876.42/1,081,379.22 = 208,533.51/x
  3. Step 3: Cross multiply
    720,876.42x = 1,081,379.22 × 208,533.51
  4. Step 4: Simplify right side
    720,876.42x = 225,503,804,387.66
  5. Step 5: Solve for x
    x = 225,503,804,387.66/720,876.42
  6. Step 6: Final answer
    x = 312,818.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.