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Finding the Fourth Proportional to 309,020.40, 463,415.40 and 121,993.20

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Solution

The fourth proportional to 309,020.40, 463,415.40 and 121,993.20 is: 182,944.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,020.40 : 463,415.40 = 121,993.20 : x
  2. Step 2: Convert to fraction form
    309,020.40/463,415.40 = 121,993.20/x
  3. Step 3: Cross multiply
    309,020.40x = 463,415.40 × 121,993.20
  4. Step 4: Simplify right side
    309,020.40x = 56,533,527,575.28
  5. Step 5: Solve for x
    x = 56,533,527,575.28/309,020.40
  6. Step 6: Final answer
    x = 182,944.32

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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.