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Finding the Fourth Proportional to 638,287.90, 957,650.55 and 217,859.02

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Solution

The fourth proportional to 638,287.90, 957,650.55 and 217,859.02 is: 326,863.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,287.90 : 957,650.55 = 217,859.02 : x
  2. Step 2: Convert to fraction form
    638,287.90/957,650.55 = 217,859.02/x
  3. Step 3: Cross multiply
    638,287.90x = 957,650.55 × 217,859.02
  4. Step 4: Simplify right side
    638,287.90x = 208,632,807,114.36
  5. Step 5: Solve for x
    x = 208,632,807,114.36/638,287.90
  6. Step 6: Final answer
    x = 326,863.17

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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.