Home / 420,686.37-580,554.68-239,379.21

Finding the Fourth Proportional to 420,686.37, 580,554.68 and 239,379.21

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Solution

The fourth proportional to 420,686.37, 580,554.68 and 239,379.21 is: 330,347.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,686.37 : 580,554.68 = 239,379.21 : x
  2. Step 2: Convert to fraction form
    420,686.37/580,554.68 = 239,379.21/x
  3. Step 3: Cross multiply
    420,686.37x = 580,554.68 × 239,379.21
  4. Step 4: Simplify right side
    420,686.37x = 138,972,719,463.31
  5. Step 5: Solve for x
    x = 138,972,719,463.31/420,686.37
  6. Step 6: Final answer
    x = 330,347.57

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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.