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Finding the Fourth Proportional to 611,404.52, 916,811.70 and 256,323.20

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Solution

The fourth proportional to 611,404.52, 916,811.70 and 256,323.20 is: 384,361.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,404.52 : 916,811.70 = 256,323.20 : x
  2. Step 2: Convert to fraction form
    611,404.52/916,811.70 = 256,323.20/x
  3. Step 3: Cross multiply
    611,404.52x = 916,811.70 × 256,323.20
  4. Step 4: Simplify right side
    611,404.52x = 235,000,108,741.44
  5. Step 5: Solve for x
    x = 235,000,108,741.44/611,404.52
  6. Step 6: Final answer
    x = 384,361.09

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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.