Home / 420,428.07-580,204.31-239,135.34

Finding the Fourth Proportional to 420,428.07, 580,204.31 and 239,135.34

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Solution

The fourth proportional to 420,428.07, 580,204.31 and 239,135.34 is: 330,014.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,428.07 : 580,204.31 = 239,135.34 : x
  2. Step 2: Convert to fraction form
    420,428.07/580,204.31 = 239,135.34/x
  3. Step 3: Cross multiply
    420,428.07x = 580,204.31 × 239,135.34
  4. Step 4: Simplify right side
    420,428.07x = 138,747,354,941.32
  5. Step 5: Solve for x
    x = 138,747,354,941.32/420,428.07
  6. Step 6: Final answer
    x = 330,014.49

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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.