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Finding the Fourth Proportional to 1,355,804.77, 1,870,947.68 and 743,942.31

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Solution

The fourth proportional to 1,355,804.77, 1,870,947.68 and 743,942.31 is: 1,026,605.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355,804.77 : 1,870,947.68 = 743,942.31 : x
  2. Step 2: Convert to fraction form
    1,355,804.77/1,870,947.68 = 743,942.31/x
  3. Step 3: Cross multiply
    1,355,804.77x = 1,870,947.68 × 743,942.31
  4. Step 4: Simplify right side
    1,355,804.77x = 1,391,877,138,948.34
  5. Step 5: Solve for x
    x = 1,391,877,138,948.34/1,355,804.77
  6. Step 6: Final answer
    x = 1,026,605.87

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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.