Home / 420,362.81-580,113.48-239,100.83

Finding the Fourth Proportional to 420,362.81, 580,113.48 and 239,100.83

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Solution

The fourth proportional to 420,362.81, 580,113.48 and 239,100.83 is: 329,966.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,362.81 : 580,113.48 = 239,100.83 : x
  2. Step 2: Convert to fraction form
    420,362.81/580,113.48 = 239,100.83/x
  3. Step 3: Cross multiply
    420,362.81x = 580,113.48 × 239,100.83
  4. Step 4: Simplify right side
    420,362.81x = 138,705,614,562.19
  5. Step 5: Solve for x
    x = 138,705,614,562.19/420,362.81
  6. Step 6: Final answer
    x = 329,966.43

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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.