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Finding the Fourth Proportional to 420,449.05, 630,298.59 and 154,147.51

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Solution

The fourth proportional to 420,449.05, 630,298.59 and 154,147.51 is: 231,083.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,449.05 : 630,298.59 = 154,147.51 : x
  2. Step 2: Convert to fraction form
    420,449.05/630,298.59 = 154,147.51/x
  3. Step 3: Cross multiply
    420,449.05x = 630,298.59 × 154,147.51
  4. Step 4: Simplify right side
    420,449.05x = 97,158,958,205.01
  5. Step 5: Solve for x
    x = 97,158,958,205.01/420,449.05
  6. Step 6: Final answer
    x = 231,083.79

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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.