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Finding the Fourth Proportional to 309,486.45, 427,081.47 and 173,528.17

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Solution

The fourth proportional to 309,486.45, 427,081.47 and 173,528.17 is: 239,463.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,486.45 : 427,081.47 = 173,528.17 : x
  2. Step 2: Convert to fraction form
    309,486.45/427,081.47 = 173,528.17/x
  3. Step 3: Cross multiply
    309,486.45x = 427,081.47 × 173,528.17
  4. Step 4: Simplify right side
    309,486.45x = 74,110,665,930.01
  5. Step 5: Solve for x
    x = 74,110,665,930.01/309,486.45
  6. Step 6: Final answer
    x = 239,463.36

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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.