Home / 1,189,445.20-1,641,390.46-645,569.31

Finding the Fourth Proportional to 1,189,445.20, 1,641,390.46 and 645,569.31

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Solution

The fourth proportional to 1,189,445.20, 1,641,390.46 and 645,569.31 is: 890,861.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,445.20 : 1,641,390.46 = 645,569.31 : x
  2. Step 2: Convert to fraction form
    1,189,445.20/1,641,390.46 = 645,569.31/x
  3. Step 3: Cross multiply
    1,189,445.20x = 1,641,390.46 × 645,569.31
  4. Step 4: Simplify right side
    1,189,445.20x = 1,059,631,305,088.86
  5. Step 5: Solve for x
    x = 1,059,631,305,088.86/1,189,445.20
  6. Step 6: Final answer
    x = 890,861.81

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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.