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Finding the Fourth Proportional to 403,010.81, 556,154.93 and 221,718.86

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Solution

The fourth proportional to 403,010.81, 556,154.93 and 221,718.86 is: 305,972.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,010.81 : 556,154.93 = 221,718.86 : x
  2. Step 2: Convert to fraction form
    403,010.81/556,154.93 = 221,718.86/x
  3. Step 3: Cross multiply
    403,010.81x = 556,154.93 × 221,718.86
  4. Step 4: Simplify right side
    403,010.81x = 123,310,034,836.50
  5. Step 5: Solve for x
    x = 123,310,034,836.50/403,010.81
  6. Step 6: Final answer
    x = 305,972.03

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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.