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Finding the Fourth Proportional to 288,859.60, 398,726.46 and 198,514.63

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Solution

The fourth proportional to 288,859.60, 398,726.46 and 198,514.63 is: 274,019.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,859.60 : 398,726.46 = 198,514.63 : x
  2. Step 2: Convert to fraction form
    288,859.60/398,726.46 = 198,514.63/x
  3. Step 3: Cross multiply
    288,859.60x = 398,726.46 × 198,514.63
  4. Step 4: Simplify right side
    288,859.60x = 79,153,035,678.11
  5. Step 5: Solve for x
    x = 79,153,035,678.11/288,859.60
  6. Step 6: Final answer
    x = 274,019.06

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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.