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Finding the Fourth Proportional to 420,143.53, 630,495.56 and 217,926.01

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Solution

The fourth proportional to 420,143.53, 630,495.56 and 217,926.01 is: 327,034.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,143.53 : 630,495.56 = 217,926.01 : x
  2. Step 2: Convert to fraction form
    420,143.53/630,495.56 = 217,926.01/x
  3. Step 3: Cross multiply
    420,143.53x = 630,495.56 × 217,926.01
  4. Step 4: Simplify right side
    420,143.53x = 137,401,380,623.89
  5. Step 5: Solve for x
    x = 137,401,380,623.89/420,143.53
  6. Step 6: Final answer
    x = 327,034.38

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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.