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Finding the Fourth Proportional to 307,449.50, 424,280.31 and 173,313.50

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Solution

The fourth proportional to 307,449.50, 424,280.31 and 173,313.50 is: 239,172.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,449.50 : 424,280.31 = 173,313.50 : x
  2. Step 2: Convert to fraction form
    307,449.50/424,280.31 = 173,313.50/x
  3. Step 3: Cross multiply
    307,449.50x = 424,280.31 × 173,313.50
  4. Step 4: Simplify right side
    307,449.50x = 73,533,505,507.19
  5. Step 5: Solve for x
    x = 73,533,505,507.19/307,449.50
  6. Step 6: Final answer
    x = 239,172.63

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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.