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Finding the Fourth Proportional to 401,351.86, 553,859.23 and 220,065.28

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Solution

The fourth proportional to 401,351.86, 553,859.23 and 220,065.28 is: 303,686.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,351.86 : 553,859.23 = 220,065.28 : x
  2. Step 2: Convert to fraction form
    401,351.86/553,859.23 = 220,065.28/x
  3. Step 3: Cross multiply
    401,351.86x = 553,859.23 × 220,065.28
  4. Step 4: Simplify right side
    401,351.86x = 121,885,186,875.54
  5. Step 5: Solve for x
    x = 121,885,186,875.54/401,351.86
  6. Step 6: Final answer
    x = 303,686.61

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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.