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Finding the Fourth Proportional to 291,428.54, 437,211.63 and 91,748.90

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Solution

The fourth proportional to 291,428.54, 437,211.63 and 91,748.90 is: 137,645.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,428.54 : 437,211.63 = 91,748.90 : x
  2. Step 2: Convert to fraction form
    291,428.54/437,211.63 = 91,748.90/x
  3. Step 3: Cross multiply
    291,428.54x = 437,211.63 × 91,748.90
  4. Step 4: Simplify right side
    291,428.54x = 40,113,686,119.71
  5. Step 5: Solve for x
    x = 40,113,686,119.71/291,428.54
  6. Step 6: Final answer
    x = 137,645.02

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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.