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Finding the Fourth Proportional to 336,871.20, 505,501.20 and 126,530.40

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Solution

The fourth proportional to 336,871.20, 505,501.20 and 126,530.40 is: 189,868.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    336,871.20 : 505,501.20 = 126,530.40 : x
  2. Step 2: Convert to fraction form
    336,871.20/505,501.20 = 126,530.40/x
  3. Step 3: Cross multiply
    336,871.20x = 505,501.20 × 126,530.40
  4. Step 4: Simplify right side
    336,871.20x = 63,961,269,036.48
  5. Step 5: Solve for x
    x = 63,961,269,036.48/336,871.20
  6. Step 6: Final answer
    x = 189,868.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.