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Finding the Fourth Proportional to 612,059.70, 918,089.55 and 517,581.30

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Solution

The fourth proportional to 612,059.70, 918,089.55 and 517,581.30 is: 776,371.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,059.70 : 918,089.55 = 517,581.30 : x
  2. Step 2: Convert to fraction form
    612,059.70/918,089.55 = 517,581.30/x
  3. Step 3: Cross multiply
    612,059.70x = 918,089.55 × 517,581.30
  4. Step 4: Simplify right side
    612,059.70x = 475,185,982,805.42
  5. Step 5: Solve for x
    x = 475,185,982,805.42/612,059.70
  6. Step 6: Final answer
    x = 776,371.95

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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.