Home / 811,285.32-1,215,064.68-405,231.18

Finding the Fourth Proportional to 811,285.32, 1,215,064.68 and 405,231.18

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Solution

The fourth proportional to 811,285.32, 1,215,064.68 and 405,231.18 is: 606,916.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,285.32 : 1,215,064.68 = 405,231.18 : x
  2. Step 2: Convert to fraction form
    811,285.32/1,215,064.68 = 405,231.18/x
  3. Step 3: Cross multiply
    811,285.32x = 1,215,064.68 × 405,231.18
  4. Step 4: Simplify right side
    811,285.32x = 492,382,094,052.72
  5. Step 5: Solve for x
    x = 492,382,094,052.72/811,285.32
  6. Step 6: Final answer
    x = 606,916.07

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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.