Home / 811,431.27-1,217,257.62-338,005.91

Finding the Fourth Proportional to 811,431.27, 1,217,257.62 and 338,005.91

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Solution

The fourth proportional to 811,431.27, 1,217,257.62 and 338,005.91 is: 507,054.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,431.27 : 1,217,257.62 = 338,005.91 : x
  2. Step 2: Convert to fraction form
    811,431.27/1,217,257.62 = 338,005.91/x
  3. Step 3: Cross multiply
    811,431.27x = 1,217,257.62 × 338,005.91
  4. Step 4: Simplify right side
    811,431.27x = 411,440,261,776.22
  5. Step 5: Solve for x
    x = 411,440,261,776.22/811,431.27
  6. Step 6: Final answer
    x = 507,054.98

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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.