Home / 420,808.94-580,720.03-239,532.54

Finding the Fourth Proportional to 420,808.94, 580,720.03 and 239,532.54

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Solution

The fourth proportional to 420,808.94, 580,720.03 and 239,532.54 is: 330,557.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,808.94 : 580,720.03 = 239,532.54 : x
  2. Step 2: Convert to fraction form
    420,808.94/580,720.03 = 239,532.54/x
  3. Step 3: Cross multiply
    420,808.94x = 580,720.03 × 239,532.54
  4. Step 4: Simplify right side
    420,808.94x = 139,101,345,652.17
  5. Step 5: Solve for x
    x = 139,101,345,652.17/420,808.94
  6. Step 6: Final answer
    x = 330,557.01

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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.