Home / 1,189,221.51-1,641,126.74-645,357.30

Finding the Fourth Proportional to 1,189,221.51, 1,641,126.74 and 645,357.30

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Solution

The fourth proportional to 1,189,221.51, 1,641,126.74 and 645,357.30 is: 890,593.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,221.51 : 1,641,126.74 = 645,357.30 : x
  2. Step 2: Convert to fraction form
    1,189,221.51/1,641,126.74 = 645,357.30/x
  3. Step 3: Cross multiply
    1,189,221.51x = 1,641,126.74 × 645,357.30
  4. Step 4: Simplify right side
    1,189,221.51x = 1,059,113,121,884.20
  5. Step 5: Solve for x
    x = 1,059,113,121,884.20/1,189,221.51
  6. Step 6: Final answer
    x = 890,593.65

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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.