Home / 1,189,445.45-1,641,390.80-645,569.56

Finding the Fourth Proportional to 1,189,445.45, 1,641,390.80 and 645,569.56

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Solution

The fourth proportional to 1,189,445.45, 1,641,390.80 and 645,569.56 is: 890,862.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,445.45 : 1,641,390.80 = 645,569.56 : x
  2. Step 2: Convert to fraction form
    1,189,445.45/1,641,390.80 = 645,569.56/x
  3. Step 3: Cross multiply
    1,189,445.45x = 1,641,390.80 × 645,569.56
  4. Step 4: Simplify right side
    1,189,445.45x = 1,059,631,938,157.97
  5. Step 5: Solve for x
    x = 1,059,631,938,157.97/1,189,445.45
  6. Step 6: Final answer
    x = 890,862.15

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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.