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Finding the Fourth Proportional to 403,004.66, 556,146.45 and 221,712.71

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Solution

The fourth proportional to 403,004.66, 556,146.45 and 221,712.71 is: 305,963.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,004.66 : 556,146.45 = 221,712.71 : x
  2. Step 2: Convert to fraction form
    403,004.66/556,146.45 = 221,712.71/x
  3. Step 3: Cross multiply
    403,004.66x = 556,146.45 × 221,712.71
  4. Step 4: Simplify right side
    403,004.66x = 123,304,733,805.65
  5. Step 5: Solve for x
    x = 123,304,733,805.65/403,004.66
  6. Step 6: Final answer
    x = 305,963.55

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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.