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Finding the Fourth Proportional to 659,416.20, 989,124.30 and 393,695.70

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Solution

The fourth proportional to 659,416.20, 989,124.30 and 393,695.70 is: 590,543.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,416.20 : 989,124.30 = 393,695.70 : x
  2. Step 2: Convert to fraction form
    659,416.20/989,124.30 = 393,695.70/x
  3. Step 3: Cross multiply
    659,416.20x = 989,124.30 × 393,695.70
  4. Step 4: Simplify right side
    659,416.20x = 389,413,983,675.51
  5. Step 5: Solve for x
    x = 389,413,983,675.51/659,416.20
  6. Step 6: Final answer
    x = 590,543.55

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Similar ratio
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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.