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Finding the Fourth Proportional to 1,354,890.13, 1,869,751.04 and 743,047.21

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Solution

The fourth proportional to 1,354,890.13, 1,869,751.04 and 743,047.21 is: 1,025,406.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,354,890.13 : 1,869,751.04 = 743,047.21 : x
  2. Step 2: Convert to fraction form
    1,354,890.13/1,869,751.04 = 743,047.21/x
  3. Step 3: Cross multiply
    1,354,890.13x = 1,869,751.04 × 743,047.21
  4. Step 4: Simplify right side
    1,354,890.13x = 1,389,313,293,666.60
  5. Step 5: Solve for x
    x = 1,389,313,293,666.60/1,354,890.13
  6. Step 6: Final answer
    x = 1,025,406.61

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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.