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Finding the Fourth Proportional to 318,910.30, 478,365.45 and 185,940.70

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Solution

The fourth proportional to 318,910.30, 478,365.45 and 185,940.70 is: 278,911.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,910.30 : 478,365.45 = 185,940.70 : x
  2. Step 2: Convert to fraction form
    318,910.30/478,365.45 = 185,940.70/x
  3. Step 3: Cross multiply
    318,910.30x = 478,365.45 × 185,940.70
  4. Step 4: Simplify right side
    318,910.30x = 88,947,606,628.82
  5. Step 5: Solve for x
    x = 88,947,606,628.82/318,910.30
  6. Step 6: Final answer
    x = 278,911.05

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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.