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Finding the Fourth Proportional to 408,487.67, 611,421.35 and 218,472.91

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Solution

The fourth proportional to 408,487.67, 611,421.35 and 218,472.91 is: 327,008.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,487.67 : 611,421.35 = 218,472.91 : x
  2. Step 2: Convert to fraction form
    408,487.67/611,421.35 = 218,472.91/x
  3. Step 3: Cross multiply
    408,487.67x = 611,421.35 × 218,472.91
  4. Step 4: Simplify right side
    408,487.67x = 133,578,997,421.16
  5. Step 5: Solve for x
    x = 133,578,997,421.16/408,487.67
  6. Step 6: Final answer
    x = 327,008.64

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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.