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Finding the Fourth Proportional to 630,428.20, 945,123.90 and 334,940.20

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Solution

The fourth proportional to 630,428.20, 945,123.90 and 334,940.20 is: 502,134.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,428.20 : 945,123.90 = 334,940.20 : x
  2. Step 2: Convert to fraction form
    630,428.20/945,123.90 = 334,940.20/x
  3. Step 3: Cross multiply
    630,428.20x = 945,123.90 × 334,940.20
  4. Step 4: Simplify right side
    630,428.20x = 316,559,988,090.78
  5. Step 5: Solve for x
    x = 316,559,988,090.78/630,428.20
  6. Step 6: Final answer
    x = 502,134.88

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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.