Home / 420,268.12-579,967.20-238,980.06

Finding the Fourth Proportional to 420,268.12, 579,967.20 and 238,980.06

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Solution

The fourth proportional to 420,268.12, 579,967.20 and 238,980.06 is: 329,790.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,268.12 : 579,967.20 = 238,980.06 : x
  2. Step 2: Convert to fraction form
    420,268.12/579,967.20 = 238,980.06/x
  3. Step 3: Cross multiply
    420,268.12x = 579,967.20 × 238,980.06
  4. Step 4: Simplify right side
    420,268.12x = 138,600,596,254.03
  5. Step 5: Solve for x
    x = 138,600,596,254.03/420,268.12
  6. Step 6: Final answer
    x = 329,790.89

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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.