Home / 664,982.12-917,741.38-396,710.12

Finding the Fourth Proportional to 664,982.12, 917,741.38 and 396,710.12

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Solution

The fourth proportional to 664,982.12, 917,741.38 and 396,710.12 is: 547,499.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,982.12 : 917,741.38 = 396,710.12 : x
  2. Step 2: Convert to fraction form
    664,982.12/917,741.38 = 396,710.12/x
  3. Step 3: Cross multiply
    664,982.12x = 917,741.38 × 396,710.12
  4. Step 4: Simplify right side
    664,982.12x = 364,077,292,988.77
  5. Step 5: Solve for x
    x = 364,077,292,988.77/664,982.12
  6. Step 6: Final answer
    x = 547,499.37

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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.