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Finding the Fourth Proportional to 611,213.70, 916,820.55 and 556,101.30

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Solution

The fourth proportional to 611,213.70, 916,820.55 and 556,101.30 is: 834,151.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,213.70 : 916,820.55 = 556,101.30 : x
  2. Step 2: Convert to fraction form
    611,213.70/916,820.55 = 556,101.30/x
  3. Step 3: Cross multiply
    611,213.70x = 916,820.55 × 556,101.30
  4. Step 4: Simplify right side
    611,213.70x = 509,845,099,721.72
  5. Step 5: Solve for x
    x = 509,845,099,721.72/611,213.70
  6. Step 6: Final answer
    x = 834,151.95

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Double scale
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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.