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Finding the Fourth Proportional to 638,020.64, 955,328.88 and 505,172

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Solution

The fourth proportional to 638,020.64, 955,328.88 and 505,172 is: 756,410.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,020.64 : 955,328.88 = 505,172 : x
  2. Step 2: Convert to fraction form
    638,020.64/955,328.88 = 505,172/x
  3. Step 3: Cross multiply
    638,020.64x = 955,328.88 × 505,172
  4. Step 4: Simplify right side
    638,020.64x = 482,605,400,967.36
  5. Step 5: Solve for x
    x = 482,605,400,967.36/638,020.64
  6. Step 6: Final answer
    x = 756,410.33

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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.