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Finding the Fourth Proportional to 309,393.68, 426,993.53 and 173,427.89

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Solution

The fourth proportional to 309,393.68, 426,993.53 and 173,427.89 is: 239,347.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,393.68 : 426,993.53 = 173,427.89 : x
  2. Step 2: Convert to fraction form
    309,393.68/426,993.53 = 173,427.89/x
  3. Step 3: Cross multiply
    309,393.68x = 426,993.53 × 173,427.89
  4. Step 4: Simplify right side
    309,393.68x = 74,052,583,949.44
  5. Step 5: Solve for x
    x = 74,052,583,949.44/309,393.68
  6. Step 6: Final answer
    x = 239,347.44

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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.