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Finding the Fourth Proportional to 309,596.20, 427,238.02 and 173,630.12

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Solution

The fourth proportional to 309,596.20, 427,238.02 and 173,630.12 is: 239,606.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,596.20 : 427,238.02 = 173,630.12 : x
  2. Step 2: Convert to fraction form
    309,596.20/427,238.02 = 173,630.12/x
  3. Step 3: Cross multiply
    309,596.20x = 427,238.02 × 173,630.12
  4. Step 4: Simplify right side
    309,596.20x = 74,181,388,681.16
  5. Step 5: Solve for x
    x = 74,181,388,681.16/309,596.20
  6. Step 6: Final answer
    x = 239,606.91

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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.