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Finding the Fourth Proportional to 611,548.20, 916,630.20 and 311,394.72

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Solution

The fourth proportional to 611,548.20, 916,630.20 and 311,394.72 is: 466,739.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,548.20 : 916,630.20 = 311,394.72 : x
  2. Step 2: Convert to fraction form
    611,548.20/916,630.20 = 311,394.72/x
  3. Step 3: Cross multiply
    611,548.20x = 916,630.20 × 311,394.72
  4. Step 4: Simplify right side
    611,548.20x = 285,433,804,472.54
  5. Step 5: Solve for x
    x = 285,433,804,472.54/611,548.20
  6. Step 6: Final answer
    x = 466,739.67

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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.