Home / 420,397.12-630,578.04-195,680.28

Finding the Fourth Proportional to 420,397.12, 630,578.04 and 195,680.28

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Solution

The fourth proportional to 420,397.12, 630,578.04 and 195,680.28 is: 293,512.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,397.12 : 630,578.04 = 195,680.28 : x
  2. Step 2: Convert to fraction form
    420,397.12/630,578.04 = 195,680.28/x
  3. Step 3: Cross multiply
    420,397.12x = 630,578.04 × 195,680.28
  4. Step 4: Simplify right side
    420,397.12x = 123,391,687,429.05
  5. Step 5: Solve for x
    x = 123,391,687,429.05/420,397.12
  6. Step 6: Final answer
    x = 293,512.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.