Home / 420,423.36-580,162.70-239,131.29

Finding the Fourth Proportional to 420,423.36, 580,162.70 and 239,131.29

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Solution

The fourth proportional to 420,423.36, 580,162.70 and 239,131.29 is: 329,988.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,423.36 : 580,162.70 = 239,131.29 : x
  2. Step 2: Convert to fraction form
    420,423.36/580,162.70 = 239,131.29/x
  3. Step 3: Cross multiply
    420,423.36x = 580,162.70 × 239,131.29
  4. Step 4: Simplify right side
    420,423.36x = 138,735,054,370.91
  5. Step 5: Solve for x
    x = 138,735,054,370.91/420,423.36
  6. Step 6: Final answer
    x = 329,988.93

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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.