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Finding the Fourth Proportional to 309,403.70, 427,007.34 and 173,437.90

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Solution

The fourth proportional to 309,403.70, 427,007.34 and 173,437.90 is: 239,361.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,403.70 : 427,007.34 = 173,437.90 : x
  2. Step 2: Convert to fraction form
    309,403.70/427,007.34 = 173,437.90/x
  3. Step 3: Cross multiply
    309,403.70x = 427,007.34 × 173,437.90
  4. Step 4: Simplify right side
    309,403.70x = 74,059,256,334.19
  5. Step 5: Solve for x
    x = 74,059,256,334.19/309,403.70
  6. Step 6: Final answer
    x = 239,361.25

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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.