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Finding the Fourth Proportional to 420,478.69, 630,801.11 and 154,241.51

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Solution

The fourth proportional to 420,478.69, 630,801.11 and 154,241.51 is: 231,392.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,478.69 : 630,801.11 = 154,241.51 : x
  2. Step 2: Convert to fraction form
    420,478.69/630,801.11 = 154,241.51/x
  3. Step 3: Cross multiply
    420,478.69x = 630,801.11 × 154,241.51
  4. Step 4: Simplify right side
    420,478.69x = 97,295,715,716.08
  5. Step 5: Solve for x
    x = 97,295,715,716.08/420,478.69
  6. Step 6: Final answer
    x = 231,392.74

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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.