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Finding the Fourth Proportional to 691,419.50, 954,158.92 and 389,624.30

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Solution

The fourth proportional to 691,419.50, 954,158.92 and 389,624.30 is: 537,681.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,419.50 : 954,158.92 = 389,624.30 : x
  2. Step 2: Convert to fraction form
    691,419.50/954,158.92 = 389,624.30/x
  3. Step 3: Cross multiply
    691,419.50x = 954,158.92 × 389,624.30
  4. Step 4: Simplify right side
    691,419.50x = 371,763,501,293.76
  5. Step 5: Solve for x
    x = 371,763,501,293.76/691,419.50
  6. Step 6: Final answer
    x = 537,681.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.