Home / 811,428.30-1,119,499.08-467,256.81

Finding the Fourth Proportional to 811,428.30, 1,119,499.08 and 467,256.81

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Solution

The fourth proportional to 811,428.30, 1,119,499.08 and 467,256.81 is: 644,657.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,428.30 : 1,119,499.08 = 467,256.81 : x
  2. Step 2: Convert to fraction form
    811,428.30/1,119,499.08 = 467,256.81/x
  3. Step 3: Cross multiply
    811,428.30x = 1,119,499.08 × 467,256.81
  4. Step 4: Simplify right side
    811,428.30x = 523,093,568,918.74
  5. Step 5: Solve for x
    x = 523,093,568,918.74/811,428.30
  6. Step 6: Final answer
    x = 644,657.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.