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Finding the Fourth Proportional to 505,390.69, 757,830 and 168,313.17

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Solution

The fourth proportional to 505,390.69, 757,830 and 168,313.17 is: 252,384.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,390.69 : 757,830 = 168,313.17 : x
  2. Step 2: Convert to fraction form
    505,390.69/757,830 = 168,313.17/x
  3. Step 3: Cross multiply
    505,390.69x = 757,830 × 168,313.17
  4. Step 4: Simplify right side
    505,390.69x = 127,552,769,621.10
  5. Step 5: Solve for x
    x = 127,552,769,621.10/505,390.69
  6. Step 6: Final answer
    x = 252,384.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.