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Finding the Fourth Proportional to 318,912.30, 478,368.45 and 185,942.70

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Solution

The fourth proportional to 318,912.30, 478,368.45 and 185,942.70 is: 278,914.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,912.30 : 478,368.45 = 185,942.70 : x
  2. Step 2: Convert to fraction form
    318,912.30/478,368.45 = 185,942.70/x
  3. Step 3: Cross multiply
    318,912.30x = 478,368.45 × 185,942.70
  4. Step 4: Simplify right side
    318,912.30x = 88,949,121,187.82
  5. Step 5: Solve for x
    x = 88,949,121,187.82/318,912.30
  6. Step 6: Final answer
    x = 278,914.05

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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.