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Finding the Fourth Proportional to 276,625.68, 381,779.81 and 155,790.59

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Solution

The fourth proportional to 276,625.68, 381,779.81 and 155,790.59 is: 215,011.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,625.68 : 381,779.81 = 155,790.59 : x
  2. Step 2: Convert to fraction form
    276,625.68/381,779.81 = 155,790.59/x
  3. Step 3: Cross multiply
    276,625.68x = 381,779.81 × 155,790.59
  4. Step 4: Simplify right side
    276,625.68x = 59,477,699,746.35
  5. Step 5: Solve for x
    x = 59,477,699,746.35/276,625.68
  6. Step 6: Final answer
    x = 215,011.49

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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.