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Finding the Fourth Proportional to 318,055.96, 438,981.06 and 188,969.59

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Solution

The fourth proportional to 318,055.96, 438,981.06 and 188,969.59 is: 260,815.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,055.96 : 438,981.06 = 188,969.59 : x
  2. Step 2: Convert to fraction form
    318,055.96/438,981.06 = 188,969.59/x
  3. Step 3: Cross multiply
    318,055.96x = 438,981.06 × 188,969.59
  4. Step 4: Simplify right side
    318,055.96x = 82,954,070,925.97
  5. Step 5: Solve for x
    x = 82,954,070,925.97/318,055.96
  6. Step 6: Final answer
    x = 260,815.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.