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Finding the Fourth Proportional to 253,638.78, 380,368.41 and 73,686.76

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Solution

The fourth proportional to 253,638.78, 380,368.41 and 73,686.76 is: 110,504.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,638.78 : 380,368.41 = 73,686.76 : x
  2. Step 2: Convert to fraction form
    253,638.78/380,368.41 = 73,686.76/x
  3. Step 3: Cross multiply
    253,638.78x = 380,368.41 × 73,686.76
  4. Step 4: Simplify right side
    253,638.78x = 28,028,115,739.25
  5. Step 5: Solve for x
    x = 28,028,115,739.25/253,638.78
  6. Step 6: Final answer
    x = 110,504.07

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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.