Home / 420,206.20-630,348.42-167,425.72

Finding the Fourth Proportional to 420,206.20, 630,348.42 and 167,425.72

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Solution

The fourth proportional to 420,206.20, 630,348.42 and 167,425.72 is: 251,154.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,206.20 : 630,348.42 = 167,425.72 : x
  2. Step 2: Convert to fraction form
    420,206.20/630,348.42 = 167,425.72/x
  3. Step 3: Cross multiply
    420,206.20x = 630,348.42 × 167,425.72
  4. Step 4: Simplify right side
    420,206.20x = 105,536,538,069.36
  5. Step 5: Solve for x
    x = 105,536,538,069.36/420,206.20
  6. Step 6: Final answer
    x = 251,154.17

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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.