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Finding the Fourth Proportional to 553,493.36, 763,736.48 and 311,760.64

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Solution

The fourth proportional to 553,493.36, 763,736.48 and 311,760.64 is: 430,182.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,493.36 : 763,736.48 = 311,760.64 : x
  2. Step 2: Convert to fraction form
    553,493.36/763,736.48 = 311,760.64/x
  3. Step 3: Cross multiply
    553,493.36x = 763,736.48 × 311,760.64
  4. Step 4: Simplify right side
    553,493.36x = 238,102,973,796.15
  5. Step 5: Solve for x
    x = 238,102,973,796.15/553,493.36
  6. Step 6: Final answer
    x = 430,182.17

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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.