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Finding the Fourth Proportional to 578,215.98, 798,167.52 and 391,990.23

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Solution

The fourth proportional to 578,215.98, 798,167.52 and 391,990.23 is: 541,102.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,215.98 : 798,167.52 = 391,990.23 : x
  2. Step 2: Convert to fraction form
    578,215.98/798,167.52 = 391,990.23/x
  3. Step 3: Cross multiply
    578,215.98x = 798,167.52 × 391,990.23
  4. Step 4: Simplify right side
    578,215.98x = 312,873,869,743.33
  5. Step 5: Solve for x
    x = 312,873,869,743.33/578,215.98
  6. Step 6: Final answer
    x = 541,102.08

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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.