Home / 1,189,221-1,641,126.04-645,356.80

Finding the Fourth Proportional to 1,189,221, 1,641,126.04 and 645,356.80

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Solution

The fourth proportional to 1,189,221, 1,641,126.04 and 645,356.80 is: 890,592.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,221 : 1,641,126.04 = 645,356.80 : x
  2. Step 2: Convert to fraction form
    1,189,221/1,641,126.04 = 645,356.80/x
  3. Step 3: Cross multiply
    1,189,221x = 1,641,126.04 × 645,356.80
  4. Step 4: Simplify right side
    1,189,221x = 1,059,111,849,571.07
  5. Step 5: Solve for x
    x = 1,059,111,849,571.07/1,189,221
  6. Step 6: Final answer
    x = 890,592.96

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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.