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Finding the Fourth Proportional to 511,919.80, 706,444.65 and 282,479.20

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Solution

The fourth proportional to 511,919.80, 706,444.65 and 282,479.20 is: 389,818.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,919.80 : 706,444.65 = 282,479.20 : x
  2. Step 2: Convert to fraction form
    511,919.80/706,444.65 = 282,479.20/x
  3. Step 3: Cross multiply
    511,919.80x = 706,444.65 × 282,479.20
  4. Step 4: Simplify right side
    511,919.80x = 199,555,919,576.28
  5. Step 5: Solve for x
    x = 199,555,919,576.28/511,919.80
  6. Step 6: Final answer
    x = 389,818.72

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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.