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Finding the Fourth Proportional to 691,780.88, 954,701.52 and 389,994.32

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Solution

The fourth proportional to 691,780.88, 954,701.52 and 389,994.32 is: 538,216.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,780.88 : 954,701.52 = 389,994.32 : x
  2. Step 2: Convert to fraction form
    691,780.88/954,701.52 = 389,994.32/x
  3. Step 3: Cross multiply
    691,780.88x = 954,701.52 × 389,994.32
  4. Step 4: Simplify right side
    691,780.88x = 372,328,170,095.37
  5. Step 5: Solve for x
    x = 372,328,170,095.37/691,780.88
  6. Step 6: Final answer
    x = 538,216.91

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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.