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Finding the Fourth Proportional to 303,921.55, 455,280.90 and 266,523.85

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Solution

The fourth proportional to 303,921.55, 455,280.90 and 266,523.85 is: 399,258.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,921.55 : 455,280.90 = 266,523.85 : x
  2. Step 2: Convert to fraction form
    303,921.55/455,280.90 = 266,523.85/x
  3. Step 3: Cross multiply
    303,921.55x = 455,280.90 × 266,523.85
  4. Step 4: Simplify right side
    303,921.55x = 121,343,218,299.47
  5. Step 5: Solve for x
    x = 121,343,218,299.47/303,921.55
  6. Step 6: Final answer
    x = 399,258.36

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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.