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Finding the Fourth Proportional to 356,495.70, 531,979.53 and 318,638.73

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Solution

The fourth proportional to 356,495.70, 531,979.53 and 318,638.73 is: 475,487.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,495.70 : 531,979.53 = 318,638.73 : x
  2. Step 2: Convert to fraction form
    356,495.70/531,979.53 = 318,638.73/x
  3. Step 3: Cross multiply
    356,495.70x = 531,979.53 × 318,638.73
  4. Step 4: Simplify right side
    356,495.70x = 169,509,281,825.20
  5. Step 5: Solve for x
    x = 169,509,281,825.20/356,495.70
  6. Step 6: Final answer
    x = 475,487.59

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.