Home / 420,420.96-580,166.28-239,119.20

Finding the Fourth Proportional to 420,420.96, 580,166.28 and 239,119.20

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Solution

The fourth proportional to 420,420.96, 580,166.28 and 239,119.20 is: 329,976.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,420.96 : 580,166.28 = 239,119.20 : x
  2. Step 2: Convert to fraction form
    420,420.96/580,166.28 = 239,119.20/x
  3. Step 3: Cross multiply
    420,420.96x = 580,166.28 × 239,119.20
  4. Step 4: Simplify right side
    420,420.96x = 138,728,896,740.58
  5. Step 5: Solve for x
    x = 138,728,896,740.58/420,420.96
  6. Step 6: Final answer
    x = 329,976.17

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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.