Home / 1,189,231.12-1,641,139.95-645,366.88

Finding the Fourth Proportional to 1,189,231.12, 1,641,139.95 and 645,366.88

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Solution

The fourth proportional to 1,189,231.12, 1,641,139.95 and 645,366.88 is: 890,606.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,231.12 : 1,641,139.95 = 645,366.88 : x
  2. Step 2: Convert to fraction form
    1,189,231.12/1,641,139.95 = 645,366.88/x
  3. Step 3: Cross multiply
    1,189,231.12x = 1,641,139.95 × 645,366.88
  4. Step 4: Simplify right side
    1,189,231.12x = 1,059,137,369,174.86
  5. Step 5: Solve for x
    x = 1,059,137,369,174.86/1,189,231.12
  6. Step 6: Final answer
    x = 890,606.84

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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.