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Finding the Fourth Proportional to 651,398.20, 976,514.10 and 426,866.20

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Solution

The fourth proportional to 651,398.20, 976,514.10 and 426,866.20 is: 639,917.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,398.20 : 976,514.10 = 426,866.20 : x
  2. Step 2: Convert to fraction form
    651,398.20/976,514.10 = 426,866.20/x
  3. Step 3: Cross multiply
    651,398.20x = 976,514.10 × 426,866.20
  4. Step 4: Simplify right side
    651,398.20x = 416,840,863,113.42
  5. Step 5: Solve for x
    x = 416,840,863,113.42/651,398.20
  6. Step 6: Final answer
    x = 639,917.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.