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Finding the Fourth Proportional to 401,963.16, 554,715.66 and 220,691.80

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Solution

The fourth proportional to 401,963.16, 554,715.66 and 220,691.80 is: 304,558.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,963.16 : 554,715.66 = 220,691.80 : x
  2. Step 2: Convert to fraction form
    401,963.16/554,715.66 = 220,691.80/x
  3. Step 3: Cross multiply
    401,963.16x = 554,715.66 × 220,691.80
  4. Step 4: Simplify right side
    401,963.16x = 122,421,197,493.59
  5. Step 5: Solve for x
    x = 122,421,197,493.59/401,963.16
  6. Step 6: Final answer
    x = 304,558.25

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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.