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Finding the Fourth Proportional to 420,418.14, 630,321.71 and 167,622.81

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Solution

The fourth proportional to 420,418.14, 630,321.71 and 167,622.81 is: 251,312.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,418.14 : 630,321.71 = 167,622.81 : x
  2. Step 2: Convert to fraction form
    420,418.14/630,321.71 = 167,622.81/x
  3. Step 3: Cross multiply
    420,418.14x = 630,321.71 × 167,622.81
  4. Step 4: Simplify right side
    420,418.14x = 105,656,296,653.26
  5. Step 5: Solve for x
    x = 105,656,296,653.26/420,418.14
  6. Step 6: Final answer
    x = 251,312.41

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1.5x scale

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.