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Finding the Fourth Proportional to 403,003.96, 556,145.46 and 221,712.01

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Solution

The fourth proportional to 403,003.96, 556,145.46 and 221,712.01 is: 305,962.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,003.96 : 556,145.46 = 221,712.01 : x
  2. Step 2: Convert to fraction form
    403,003.96/556,145.46 = 221,712.01/x
  3. Step 3: Cross multiply
    403,003.96x = 556,145.46 × 221,712.01
  4. Step 4: Simplify right side
    403,003.96x = 123,304,126,398.61
  5. Step 5: Solve for x
    x = 123,304,126,398.61/403,003.96
  6. Step 6: Final answer
    x = 305,962.57

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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.