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Finding the Fourth Proportional to 485,855.13, 670,478.34 and 270,995.03

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Solution

The fourth proportional to 485,855.13, 670,478.34 and 270,995.03 is: 373,972.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,855.13 : 670,478.34 = 270,995.03 : x
  2. Step 2: Convert to fraction form
    485,855.13/670,478.34 = 270,995.03/x
  3. Step 3: Cross multiply
    485,855.13x = 670,478.34 × 270,995.03
  4. Step 4: Simplify right side
    485,855.13x = 181,696,297,862.65
  5. Step 5: Solve for x
    x = 181,696,297,862.65/485,855.13
  6. Step 6: Final answer
    x = 373,972.17

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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.