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Finding the Fourth Proportional to 345,505.30, 518,331.74 and 120,873.06

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Solution

The fourth proportional to 345,505.30, 518,331.74 and 120,873.06 is: 181,335.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,505.30 : 518,331.74 = 120,873.06 : x
  2. Step 2: Convert to fraction form
    345,505.30/518,331.74 = 120,873.06/x
  3. Step 3: Cross multiply
    345,505.30x = 518,331.74 × 120,873.06
  4. Step 4: Simplify right side
    345,505.30x = 62,652,342,904.56
  5. Step 5: Solve for x
    x = 62,652,342,904.56/345,505.30
  6. Step 6: Final answer
    x = 181,335.40

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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.