Home / 320,011.20-442,036.80-245,479.68

Finding the Fourth Proportional to 320,011.20, 442,036.80 and 245,479.68

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Solution

The fourth proportional to 320,011.20, 442,036.80 and 245,479.68 is: 339,085.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,011.20 : 442,036.80 = 245,479.68 : x
  2. Step 2: Convert to fraction form
    320,011.20/442,036.80 = 245,479.68/x
  3. Step 3: Cross multiply
    320,011.20x = 442,036.80 × 245,479.68
  4. Step 4: Simplify right side
    320,011.20x = 108,511,052,212.22
  5. Step 5: Solve for x
    x = 108,511,052,212.22/320,011.20
  6. Step 6: Final answer
    x = 339,085.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.