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Finding the Fourth Proportional to 401,965.16, 554,718.42 and 220,693.80

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Solution

The fourth proportional to 401,965.16, 554,718.42 and 220,693.80 is: 304,561.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,965.16 : 554,718.42 = 220,693.80 : x
  2. Step 2: Convert to fraction form
    401,965.16/554,718.42 = 220,693.80/x
  3. Step 3: Cross multiply
    401,965.16x = 554,718.42 × 220,693.80
  4. Step 4: Simplify right side
    401,965.16x = 122,422,916,039.80
  5. Step 5: Solve for x
    x = 122,422,916,039.80/401,965.16
  6. Step 6: Final answer
    x = 304,561.01

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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.