Home / 1,189,321.13-1,641,264-645,456.78

Finding the Fourth Proportional to 1,189,321.13, 1,641,264 and 645,456.78

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Solution

The fourth proportional to 1,189,321.13, 1,641,264 and 645,456.78 is: 890,730.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,321.13 : 1,641,264 = 645,456.78 : x
  2. Step 2: Convert to fraction form
    1,189,321.13/1,641,264 = 645,456.78/x
  3. Step 3: Cross multiply
    1,189,321.13x = 1,641,264 × 645,456.78
  4. Step 4: Simplify right side
    1,189,321.13x = 1,059,364,976,569.92
  5. Step 5: Solve for x
    x = 1,059,364,976,569.92/1,189,321.13
  6. Step 6: Final answer
    x = 890,730.82

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Double scale
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1.5x scale

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.