Home / 811,105.29-1,217,709.72-542,949.03

Finding the Fourth Proportional to 811,105.29, 1,217,709.72 and 542,949.03

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Solution

The fourth proportional to 811,105.29, 1,217,709.72 and 542,949.03 is: 815,127.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,105.29 : 1,217,709.72 = 542,949.03 : x
  2. Step 2: Convert to fraction form
    811,105.29/1,217,709.72 = 542,949.03/x
  3. Step 3: Cross multiply
    811,105.29x = 1,217,709.72 × 542,949.03
  4. Step 4: Simplify right side
    811,105.29x = 661,154,311,295.57
  5. Step 5: Solve for x
    x = 661,154,311,295.57/811,105.29
  6. Step 6: Final answer
    x = 815,127.60

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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.