Home / 420,020.40-579,578.04-238,666.80

Finding the Fourth Proportional to 420,020.40, 579,578.04 and 238,666.80

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Solution

The fourth proportional to 420,020.40, 579,578.04 and 238,666.80 is: 329,331.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,020.40 : 579,578.04 = 238,666.80 : x
  2. Step 2: Convert to fraction form
    420,020.40/579,578.04 = 238,666.80/x
  3. Step 3: Cross multiply
    420,020.40x = 579,578.04 × 238,666.80
  4. Step 4: Simplify right side
    420,020.40x = 138,326,036,157.07
  5. Step 5: Solve for x
    x = 138,326,036,157.07/420,020.40
  6. Step 6: Final answer
    x = 329,331.71

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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.