Home / 420,355.16-580,085.30-229,371.74

Finding the Fourth Proportional to 420,355.16, 580,085.30 and 229,371.74

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Solution

The fourth proportional to 420,355.16, 580,085.30 and 229,371.74 is: 316,530.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,355.16 : 580,085.30 = 229,371.74 : x
  2. Step 2: Convert to fraction form
    420,355.16/580,085.30 = 229,371.74/x
  3. Step 3: Cross multiply
    420,355.16x = 580,085.30 × 229,371.74
  4. Step 4: Simplify right side
    420,355.16x = 133,055,174,609.42
  5. Step 5: Solve for x
    x = 133,055,174,609.42/420,355.16
  6. Step 6: Final answer
    x = 316,530.37

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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.