Home / 257,201.76-355,031.60-209,372.07

Finding the Fourth Proportional to 257,201.76, 355,031.60 and 209,372.07

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Solution

The fourth proportional to 257,201.76, 355,031.60 and 209,372.07 is: 289,009.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,201.76 : 355,031.60 = 209,372.07 : x
  2. Step 2: Convert to fraction form
    257,201.76/355,031.60 = 209,372.07/x
  3. Step 3: Cross multiply
    257,201.76x = 355,031.60 × 209,372.07
  4. Step 4: Simplify right side
    257,201.76x = 74,333,699,960.55
  5. Step 5: Solve for x
    x = 74,333,699,960.55/257,201.76
  6. Step 6: Final answer
    x = 289,009.30

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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.