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Finding the Fourth Proportional to 659,350.36, 909,513.66 and 420,886.36

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Solution

The fourth proportional to 659,350.36, 909,513.66 and 420,886.36 is: 580,574.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,350.36 : 909,513.66 = 420,886.36 : x
  2. Step 2: Convert to fraction form
    659,350.36/909,513.66 = 420,886.36/x
  3. Step 3: Cross multiply
    659,350.36x = 909,513.66 × 420,886.36
  4. Step 4: Simplify right side
    659,350.36x = 382,801,893,727.68
  5. Step 5: Solve for x
    x = 382,801,893,727.68/659,350.36
  6. Step 6: Final answer
    x = 580,574.33

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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.