Home / 811,538.13-1,216,516.09-338,358.81

Finding the Fourth Proportional to 811,538.13, 1,216,516.09 and 338,358.81

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Solution

The fourth proportional to 811,538.13, 1,216,516.09 and 338,358.81 is: 507,208.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,538.13 : 1,216,516.09 = 338,358.81 : x
  2. Step 2: Convert to fraction form
    811,538.13/1,216,516.09 = 338,358.81/x
  3. Step 3: Cross multiply
    811,538.13x = 1,216,516.09 × 338,358.81
  4. Step 4: Simplify right side
    811,538.13x = 411,618,928,783.88
  5. Step 5: Solve for x
    x = 411,618,928,783.88/811,538.13
  6. Step 6: Final answer
    x = 507,208.37

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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.