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Finding the Fourth Proportional to 611,216.20, 916,824.30 and 556,103.80

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Solution

The fourth proportional to 611,216.20, 916,824.30 and 556,103.80 is: 834,155.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,216.20 : 916,824.30 = 556,103.80 : x
  2. Step 2: Convert to fraction form
    611,216.20/916,824.30 = 556,103.80/x
  3. Step 3: Cross multiply
    611,216.20x = 916,824.30 × 556,103.80
  4. Step 4: Simplify right side
    611,216.20x = 509,849,477,162.34
  5. Step 5: Solve for x
    x = 509,849,477,162.34/611,216.20
  6. Step 6: Final answer
    x = 834,155.70

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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.