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Finding the Fourth Proportional to 309,783.57, 427,494.15 and 173,814.54

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Solution

The fourth proportional to 309,783.57, 427,494.15 and 173,814.54 is: 239,860.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,783.57 : 427,494.15 = 173,814.54 : x
  2. Step 2: Convert to fraction form
    309,783.57/427,494.15 = 173,814.54/x
  3. Step 3: Cross multiply
    309,783.57x = 427,494.15 × 173,814.54
  4. Step 4: Simplify right side
    309,783.57x = 74,304,699,034.94
  5. Step 5: Solve for x
    x = 74,304,699,034.94/309,783.57
  6. Step 6: Final answer
    x = 239,860.04

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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.