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Finding the Fourth Proportional to 346,642.80, 520,012.80 and 136,231.80

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Solution

The fourth proportional to 346,642.80, 520,012.80 and 136,231.80 is: 204,366.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,642.80 : 520,012.80 = 136,231.80 : x
  2. Step 2: Convert to fraction form
    346,642.80/520,012.80 = 136,231.80/x
  3. Step 3: Cross multiply
    346,642.80x = 520,012.80 × 136,231.80
  4. Step 4: Simplify right side
    346,642.80x = 70,842,279,767.04
  5. Step 5: Solve for x
    x = 70,842,279,767.04/346,642.80
  6. Step 6: Final answer
    x = 204,366.80

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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.