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Finding the Fourth Proportional to 505,330.76, 757,139.68 and 305,230.72

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Solution

The fourth proportional to 505,330.76, 757,139.68 and 305,230.72 is: 457,328.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,330.76 : 757,139.68 = 305,230.72 : x
  2. Step 2: Convert to fraction form
    505,330.76/757,139.68 = 305,230.72/x
  3. Step 3: Cross multiply
    505,330.76x = 757,139.68 × 305,230.72
  4. Step 4: Simplify right side
    505,330.76x = 231,102,289,666.97
  5. Step 5: Solve for x
    x = 231,102,289,666.97/505,330.76
  6. Step 6: Final answer
    x = 457,328.76

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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.