Home / 1,189,507.11-1,641,475.65-645,631.20

Finding the Fourth Proportional to 1,189,507.11, 1,641,475.65 and 645,631.20

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Solution

The fourth proportional to 1,189,507.11, 1,641,475.65 and 645,631.20 is: 890,947.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,507.11 : 1,641,475.65 = 645,631.20 : x
  2. Step 2: Convert to fraction form
    1,189,507.11/1,641,475.65 = 645,631.20/x
  3. Step 3: Cross multiply
    1,189,507.11x = 1,641,475.65 × 645,631.20
  4. Step 4: Simplify right side
    1,189,507.11x = 1,059,787,893,680.28
  5. Step 5: Solve for x
    x = 1,059,787,893,680.28/1,189,507.11
  6. Step 6: Final answer
    x = 890,947.09

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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.