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Finding the Fourth Proportional to 420,847.68, 631,290.26 and 154,462.87

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Solution

The fourth proportional to 420,847.68, 631,290.26 and 154,462.87 is: 231,701.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,847.68 : 631,290.26 = 154,462.87 : x
  2. Step 2: Convert to fraction form
    420,847.68/631,290.26 = 154,462.87/x
  3. Step 3: Cross multiply
    420,847.68x = 631,290.26 × 154,462.87
  4. Step 4: Simplify right side
    420,847.68x = 97,510,905,362.65
  5. Step 5: Solve for x
    x = 97,510,905,362.65/420,847.68
  6. Step 6: Final answer
    x = 231,701.18

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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.