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Finding the Fourth Proportional to 427,001.51, 641,289.59 and 338,821.67

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Solution

The fourth proportional to 427,001.51, 641,289.59 and 338,821.67 is: 508,857.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,001.51 : 641,289.59 = 338,821.67 : x
  2. Step 2: Convert to fraction form
    427,001.51/641,289.59 = 338,821.67/x
  3. Step 3: Cross multiply
    427,001.51x = 641,289.59 × 338,821.67
  4. Step 4: Simplify right side
    427,001.51x = 217,282,804,936.86
  5. Step 5: Solve for x
    x = 217,282,804,936.86/427,001.51
  6. Step 6: Final answer
    x = 508,857.23

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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.