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Finding the Fourth Proportional to 586,350.72, 809,165.54 and 318,078.72

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Solution

The fourth proportional to 586,350.72, 809,165.54 and 318,078.72 is: 438,949.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,350.72 : 809,165.54 = 318,078.72 : x
  2. Step 2: Convert to fraction form
    586,350.72/809,165.54 = 318,078.72/x
  3. Step 3: Cross multiply
    586,350.72x = 809,165.54 × 318,078.72
  4. Step 4: Simplify right side
    586,350.72x = 257,378,339,231.31
  5. Step 5: Solve for x
    x = 257,378,339,231.31/586,350.72
  6. Step 6: Final answer
    x = 438,949.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.