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Finding the Fourth Proportional to 612,959.40, 919,439.10 and 531,858.60

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Solution

The fourth proportional to 612,959.40, 919,439.10 and 531,858.60 is: 797,787.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,959.40 : 919,439.10 = 531,858.60 : x
  2. Step 2: Convert to fraction form
    612,959.40/919,439.10 = 531,858.60/x
  3. Step 3: Cross multiply
    612,959.40x = 919,439.10 × 531,858.60
  4. Step 4: Simplify right side
    612,959.40x = 489,011,592,511.26
  5. Step 5: Solve for x
    x = 489,011,592,511.26/612,959.40
  6. Step 6: Final answer
    x = 797,787.90

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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.