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Finding the Fourth Proportional to 399,390.64, 551,228.86 and 236,040.17

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Solution

The fourth proportional to 399,390.64, 551,228.86 and 236,040.17 is: 325,776.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,390.64 : 551,228.86 = 236,040.17 : x
  2. Step 2: Convert to fraction form
    399,390.64/551,228.86 = 236,040.17/x
  3. Step 3: Cross multiply
    399,390.64x = 551,228.86 × 236,040.17
  4. Step 4: Simplify right side
    399,390.64x = 130,112,151,067.16
  5. Step 5: Solve for x
    x = 130,112,151,067.16/399,390.64
  6. Step 6: Final answer
    x = 325,776.67

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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.