Home / 811,296.80-1,217,689.20-412,215.20

Finding the Fourth Proportional to 811,296.80, 1,217,689.20 and 412,215.20

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Solution

The fourth proportional to 811,296.80, 1,217,689.20 and 412,215.20 is: 618,700.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,296.80 : 1,217,689.20 = 412,215.20 : x
  2. Step 2: Convert to fraction form
    811,296.80/1,217,689.20 = 412,215.20/x
  3. Step 3: Cross multiply
    811,296.80x = 1,217,689.20 × 412,215.20
  4. Step 4: Simplify right side
    811,296.80x = 501,949,997,115.84
  5. Step 5: Solve for x
    x = 501,949,997,115.84/811,296.80
  6. Step 6: Final answer
    x = 618,700.82

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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.