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Finding the Fourth Proportional to 553,611.40, 830,805.90 and 354,416.20

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Solution

The fourth proportional to 553,611.40, 830,805.90 and 354,416.20 is: 531,873.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,611.40 : 830,805.90 = 354,416.20 : x
  2. Step 2: Convert to fraction form
    553,611.40/830,805.90 = 354,416.20/x
  3. Step 3: Cross multiply
    553,611.40x = 830,805.90 × 354,416.20
  4. Step 4: Simplify right side
    553,611.40x = 294,451,070,015.58
  5. Step 5: Solve for x
    x = 294,451,070,015.58/553,611.40
  6. Step 6: Final answer
    x = 531,873.21

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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.