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Finding the Fourth Proportional to 420,431.34, 630,754.98 and 120,935.37

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Solution

The fourth proportional to 420,431.34, 630,754.98 and 120,935.37 is: 181,434.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,431.34 : 630,754.98 = 120,935.37 : x
  2. Step 2: Convert to fraction form
    420,431.34/630,754.98 = 120,935.37/x
  3. Step 3: Cross multiply
    420,431.34x = 630,754.98 × 120,935.37
  4. Step 4: Simplify right side
    420,431.34x = 76,280,586,885.64
  5. Step 5: Solve for x
    x = 76,280,586,885.64/420,431.34
  6. Step 6: Final answer
    x = 181,434.11

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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.