Home / 811,504.30-1,218,000.45-412,422.70

Finding the Fourth Proportional to 811,504.30, 1,218,000.45 and 412,422.70

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Solution

The fourth proportional to 811,504.30, 1,218,000.45 and 412,422.70 is: 619,012.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,504.30 : 1,218,000.45 = 412,422.70 : x
  2. Step 2: Convert to fraction form
    811,504.30/1,218,000.45 = 412,422.70/x
  3. Step 3: Cross multiply
    811,504.30x = 1,218,000.45 × 412,422.70
  4. Step 4: Simplify right side
    811,504.30x = 502,331,034,190.22
  5. Step 5: Solve for x
    x = 502,331,034,190.22/811,504.30
  6. Step 6: Final answer
    x = 619,012.17

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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.