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Finding the Fourth Proportional to 528,514.28, 729,351.66 and 286,796.90

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Solution

The fourth proportional to 528,514.28, 729,351.66 and 286,796.90 is: 395,780.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,514.28 : 729,351.66 = 286,796.90 : x
  2. Step 2: Convert to fraction form
    528,514.28/729,351.66 = 286,796.90/x
  3. Step 3: Cross multiply
    528,514.28x = 729,351.66 × 286,796.90
  4. Step 4: Simplify right side
    528,514.28x = 209,175,791,451.10
  5. Step 5: Solve for x
    x = 209,175,791,451.10/528,514.28
  6. Step 6: Final answer
    x = 395,780.78

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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.