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Finding the Fourth Proportional to 401,386.89, 553,913.64 and 220,101.91

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Solution

The fourth proportional to 401,386.89, 553,913.64 and 220,101.91 is: 303,740.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,386.89 : 553,913.64 = 220,101.91 : x
  2. Step 2: Convert to fraction form
    401,386.89/553,913.64 = 220,101.91/x
  3. Step 3: Cross multiply
    401,386.89x = 553,913.64 × 220,101.91
  4. Step 4: Simplify right side
    401,386.89x = 121,917,448,754.27
  5. Step 5: Solve for x
    x = 121,917,448,754.27/401,386.89
  6. Step 6: Final answer
    x = 303,740.48

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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.