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Finding the Fourth Proportional to 423,920.91, 636,420.93 and 274,785.27

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Solution

The fourth proportional to 423,920.91, 636,420.93 and 274,785.27 is: 412,527.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,920.91 : 636,420.93 = 274,785.27 : x
  2. Step 2: Convert to fraction form
    423,920.91/636,420.93 = 274,785.27/x
  3. Step 3: Cross multiply
    423,920.91x = 636,420.93 × 274,785.27
  4. Step 4: Simplify right side
    423,920.91x = 174,879,097,083.70
  5. Step 5: Solve for x
    x = 174,879,097,083.70/423,920.91
  6. Step 6: Final answer
    x = 412,527.65

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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.