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Finding the Fourth Proportional to 612,179.70, 918,269.55 and 443,343.30

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Solution

The fourth proportional to 612,179.70, 918,269.55 and 443,343.30 is: 665,014.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,179.70 : 918,269.55 = 443,343.30 : x
  2. Step 2: Convert to fraction form
    612,179.70/918,269.55 = 443,343.30/x
  3. Step 3: Cross multiply
    612,179.70x = 918,269.55 × 443,343.30
  4. Step 4: Simplify right side
    612,179.70x = 407,108,652,586.52
  5. Step 5: Solve for x
    x = 407,108,652,586.52/612,179.70
  6. Step 6: Final answer
    x = 665,014.95

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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.