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Finding the Fourth Proportional to 291,274.55, 436,930.65 and 91,602.66

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Solution

The fourth proportional to 291,274.55, 436,930.65 and 91,602.66 is: 137,409.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,274.55 : 436,930.65 = 91,602.66 : x
  2. Step 2: Convert to fraction form
    291,274.55/436,930.65 = 91,602.66/x
  3. Step 3: Cross multiply
    291,274.55x = 436,930.65 × 91,602.66
  4. Step 4: Simplify right side
    291,274.55x = 40,024,009,775.53
  5. Step 5: Solve for x
    x = 40,024,009,775.53/291,274.55
  6. Step 6: Final answer
    x = 137,409.91

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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.