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Finding the Fourth Proportional to 353,556.70, 487,960.81 and 208,316.14

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Solution

The fourth proportional to 353,556.70, 487,960.81 and 208,316.14 is: 287,507.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,556.70 : 487,960.81 = 208,316.14 : x
  2. Step 2: Convert to fraction form
    353,556.70/487,960.81 = 208,316.14/x
  3. Step 3: Cross multiply
    353,556.70x = 487,960.81 × 208,316.14
  4. Step 4: Simplify right side
    353,556.70x = 101,650,110,669.78
  5. Step 5: Solve for x
    x = 101,650,110,669.78/353,556.70
  6. Step 6: Final answer
    x = 287,507.24

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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.