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Finding the Fourth Proportional to 315,394.80, 435,186.61 and 179,420.81

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Solution

The fourth proportional to 315,394.80, 435,186.61 and 179,420.81 is: 247,567.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,394.80 : 435,186.61 = 179,420.81 : x
  2. Step 2: Convert to fraction form
    315,394.80/435,186.61 = 179,420.81/x
  3. Step 3: Cross multiply
    315,394.80x = 435,186.61 × 179,420.81
  4. Step 4: Simplify right side
    315,394.80x = 78,081,531,442.87
  5. Step 5: Solve for x
    x = 78,081,531,442.87/315,394.80
  6. Step 6: Final answer
    x = 247,567.59

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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.