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Finding the Fourth Proportional to 340,748.70, 511,123.05 and 315,087.90

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Solution

The fourth proportional to 340,748.70, 511,123.05 and 315,087.90 is: 472,631.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,748.70 : 511,123.05 = 315,087.90 : x
  2. Step 2: Convert to fraction form
    340,748.70/511,123.05 = 315,087.90/x
  3. Step 3: Cross multiply
    340,748.70x = 511,123.05 × 315,087.90
  4. Step 4: Simplify right side
    340,748.70x = 161,048,688,466.10
  5. Step 5: Solve for x
    x = 161,048,688,466.10/340,748.70
  6. Step 6: Final answer
    x = 472,631.85

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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.