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Finding the Fourth Proportional to 346,691.20, 520,036.80 and 84,035.20

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Solution

The fourth proportional to 346,691.20, 520,036.80 and 84,035.20 is: 126,052.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,691.20 : 520,036.80 = 84,035.20 : x
  2. Step 2: Convert to fraction form
    346,691.20/520,036.80 = 84,035.20/x
  3. Step 3: Cross multiply
    346,691.20x = 520,036.80 × 84,035.20
  4. Step 4: Simplify right side
    346,691.20x = 43,701,396,495.36
  5. Step 5: Solve for x
    x = 43,701,396,495.36/346,691.20
  6. Step 6: Final answer
    x = 126,052.80

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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.