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Finding the Fourth Proportional to 400,987.89, 553,342.13 and 228,899.01

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Solution

The fourth proportional to 400,987.89, 553,342.13 and 228,899.01 is: 315,868.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,987.89 : 553,342.13 = 228,899.01 : x
  2. Step 2: Convert to fraction form
    400,987.89/553,342.13 = 228,899.01/x
  3. Step 3: Cross multiply
    400,987.89x = 553,342.13 × 228,899.01
  4. Step 4: Simplify right side
    400,987.89x = 126,659,465,712.21
  5. Step 5: Solve for x
    x = 126,659,465,712.21/400,987.89
  6. Step 6: Final answer
    x = 315,868.56

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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.