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Finding the Fourth Proportional to 351,453.19, 485,041.20 and 253,417.07

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Solution

The fourth proportional to 351,453.19, 485,041.20 and 253,417.07 is: 349,741.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,453.19 : 485,041.20 = 253,417.07 : x
  2. Step 2: Convert to fraction form
    351,453.19/485,041.20 = 253,417.07/x
  3. Step 3: Cross multiply
    351,453.19x = 485,041.20 × 253,417.07
  4. Step 4: Simplify right side
    351,453.19x = 122,917,719,733.28
  5. Step 5: Solve for x
    x = 122,917,719,733.28/351,453.19
  6. Step 6: Final answer
    x = 349,741.37

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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.