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Finding the Fourth Proportional to 253,004.78, 379,507.21 and 103,315.57

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Solution

The fourth proportional to 253,004.78, 379,507.21 and 103,315.57 is: 154,973.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,004.78 : 379,507.21 = 103,315.57 : x
  2. Step 2: Convert to fraction form
    253,004.78/379,507.21 = 103,315.57/x
  3. Step 3: Cross multiply
    253,004.78x = 379,507.21 × 103,315.57
  4. Step 4: Simplify right side
    253,004.78x = 39,209,002,513.20
  5. Step 5: Solve for x
    x = 39,209,002,513.20/253,004.78
  6. Step 6: Final answer
    x = 154,973.37

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1.5x scale

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.