Home / 420,039.12-579,698.40-256,791.24

Finding the Fourth Proportional to 420,039.12, 579,698.40 and 256,791.24

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Solution

The fourth proportional to 420,039.12, 579,698.40 and 256,791.24 is: 354,399.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,039.12 : 579,698.40 = 256,791.24 : x
  2. Step 2: Convert to fraction form
    420,039.12/579,698.40 = 256,791.24/x
  3. Step 3: Cross multiply
    420,039.12x = 579,698.40 × 256,791.24
  4. Step 4: Simplify right side
    420,039.12x = 148,861,470,962.02
  5. Step 5: Solve for x
    x = 148,861,470,962.02/420,039.12
  6. Step 6: Final answer
    x = 354,399.06

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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.