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Finding the Fourth Proportional to 636,636.78, 955,017.54 and 231,939

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Solution

The fourth proportional to 636,636.78, 955,017.54 and 231,939 is: 347,931.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,636.78 : 955,017.54 = 231,939 : x
  2. Step 2: Convert to fraction form
    636,636.78/955,017.54 = 231,939/x
  3. Step 3: Cross multiply
    636,636.78x = 955,017.54 × 231,939
  4. Step 4: Simplify right side
    636,636.78x = 221,505,813,210.06
  5. Step 5: Solve for x
    x = 221,505,813,210.06/636,636.78
  6. Step 6: Final answer
    x = 347,931.22

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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.