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Finding the Fourth Proportional to 309,597.20, 427,239.40 and 173,631.12

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Solution

The fourth proportional to 309,597.20, 427,239.40 and 173,631.12 is: 239,608.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,597.20 : 427,239.40 = 173,631.12 : x
  2. Step 2: Convert to fraction form
    309,597.20/427,239.40 = 173,631.12/x
  3. Step 3: Cross multiply
    309,597.20x = 427,239.40 × 173,631.12
  4. Step 4: Simplify right side
    309,597.20x = 74,182,055,530.13
  5. Step 5: Solve for x
    x = 74,182,055,530.13/309,597.20
  6. Step 6: Final answer
    x = 239,608.29

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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.