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Finding the Fourth Proportional to 318,820.10, 478,230.15 and 318,820.10

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Solution

The fourth proportional to 318,820.10, 478,230.15 and 318,820.10 is: 478,230.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,820.10 : 478,230.15 = 318,820.10 : x
  2. Step 2: Convert to fraction form
    318,820.10/478,230.15 = 318,820.10/x
  3. Step 3: Cross multiply
    318,820.10x = 478,230.15 × 318,820.10
  4. Step 4: Simplify right side
    318,820.10x = 152,469,384,246.02
  5. Step 5: Solve for x
    x = 152,469,384,246.02/318,820.10
  6. Step 6: Final answer
    x = 478,230.15

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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.