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Finding the Fourth Proportional to 612,439.70, 918,688.35 and 191,729.30

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Solution

The fourth proportional to 612,439.70, 918,688.35 and 191,729.30 is: 287,602.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,439.70 : 918,688.35 = 191,729.30 : x
  2. Step 2: Convert to fraction form
    612,439.70/918,688.35 = 191,729.30/x
  3. Step 3: Cross multiply
    612,439.70x = 918,688.35 × 191,729.30
  4. Step 4: Simplify right side
    612,439.70x = 176,139,474,263.66
  5. Step 5: Solve for x
    x = 176,139,474,263.66/612,439.70
  6. Step 6: Final answer
    x = 287,602.97

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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.