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Finding the Fourth Proportional to 612,235.70, 918,353.55 and 443,399.30

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Solution

The fourth proportional to 612,235.70, 918,353.55 and 443,399.30 is: 665,098.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,235.70 : 918,353.55 = 443,399.30 : x
  2. Step 2: Convert to fraction form
    612,235.70/918,353.55 = 443,399.30/x
  3. Step 3: Cross multiply
    612,235.70x = 918,353.55 × 443,399.30
  4. Step 4: Simplify right side
    612,235.70x = 407,197,321,222.52
  5. Step 5: Solve for x
    x = 407,197,321,222.52/612,235.70
  6. Step 6: Final answer
    x = 665,098.95

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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.