Home / 420,072.18-579,744.55-256,824.47

Finding the Fourth Proportional to 420,072.18, 579,744.55 and 256,824.47

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Solution

The fourth proportional to 420,072.18, 579,744.55 and 256,824.47 is: 354,445.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,072.18 : 579,744.55 = 256,824.47 : x
  2. Step 2: Convert to fraction form
    420,072.18/579,744.55 = 256,824.47/x
  3. Step 3: Cross multiply
    420,072.18x = 579,744.55 × 256,824.47
  4. Step 4: Simplify right side
    420,072.18x = 148,892,586,789.14
  5. Step 5: Solve for x
    x = 148,892,586,789.14/420,072.18
  6. Step 6: Final answer
    x = 354,445.25

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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.