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Finding the Fourth Proportional to 318,939.93, 478,409.90 and 299,453.76

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Solution

The fourth proportional to 318,939.93, 478,409.90 and 299,453.76 is: 449,180.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,939.93 : 478,409.90 = 299,453.76 : x
  2. Step 2: Convert to fraction form
    318,939.93/478,409.90 = 299,453.76/x
  3. Step 3: Cross multiply
    318,939.93x = 478,409.90 × 299,453.76
  4. Step 4: Simplify right side
    318,939.93x = 143,261,641,878.96
  5. Step 5: Solve for x
    x = 143,261,641,878.96/318,939.93
  6. Step 6: Final answer
    x = 449,180.64

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1.5x scale

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.