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Finding the Fourth Proportional to 318,991.36, 478,487.58 and 299,505.16

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Solution

The fourth proportional to 318,991.36, 478,487.58 and 299,505.16 is: 449,258.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,991.36 : 478,487.58 = 299,505.16 : x
  2. Step 2: Convert to fraction form
    318,991.36/478,487.58 = 299,505.16/x
  3. Step 3: Cross multiply
    318,991.36x = 478,487.58 × 299,505.16
  4. Step 4: Simplify right side
    318,991.36x = 143,309,499,205.91
  5. Step 5: Solve for x
    x = 143,309,499,205.91/318,991.36
  6. Step 6: Final answer
    x = 449,258.25

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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.