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Finding the Fourth Proportional to 1,355,803.77, 1,870,946.30 and 743,941.31

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Solution

The fourth proportional to 1,355,803.77, 1,870,946.30 and 743,941.31 is: 1,026,604.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355,803.77 : 1,870,946.30 = 743,941.31 : x
  2. Step 2: Convert to fraction form
    1,355,803.77/1,870,946.30 = 743,941.31/x
  3. Step 3: Cross multiply
    1,355,803.77x = 1,870,946.30 × 743,941.31
  4. Step 4: Simplify right side
    1,355,803.77x = 1,391,874,244,390.85
  5. Step 5: Solve for x
    x = 1,391,874,244,390.85/1,355,803.77
  6. Step 6: Final answer
    x = 1,026,604.50

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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.