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Finding the Fourth Proportional to 291,007.68, 436,529.94 and 91,335.96

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Solution

The fourth proportional to 291,007.68, 436,529.94 and 91,335.96 is: 137,009.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,007.68 : 436,529.94 = 91,335.96 : x
  2. Step 2: Convert to fraction form
    291,007.68/436,529.94 = 91,335.96/x
  3. Step 3: Cross multiply
    291,007.68x = 436,529.94 × 91,335.96
  4. Step 4: Simplify right side
    291,007.68x = 39,870,881,138.64
  5. Step 5: Solve for x
    x = 39,870,881,138.64/291,007.68
  6. Step 6: Final answer
    x = 137,009.72

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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.