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Finding the Fourth Proportional to 636,501.16, 878,786.24 and 395,138.36

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Solution

The fourth proportional to 636,501.16, 878,786.24 and 395,138.36 is: 545,548.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,501.16 : 878,786.24 = 395,138.36 : x
  2. Step 2: Convert to fraction form
    636,501.16/878,786.24 = 395,138.36/x
  3. Step 3: Cross multiply
    636,501.16x = 878,786.24 × 395,138.36
  4. Step 4: Simplify right side
    636,501.16x = 347,242,151,688.48
  5. Step 5: Solve for x
    x = 347,242,151,688.48/636,501.16
  6. Step 6: Final answer
    x = 545,548.34

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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.