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Finding the Fourth Proportional to 673,884, 930,078.72 and 401,968.80

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Solution

The fourth proportional to 673,884, 930,078.72 and 401,968.80 is: 554,787.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    673,884 : 930,078.72 = 401,968.80 : x
  2. Step 2: Convert to fraction form
    673,884/930,078.72 = 401,968.80/x
  3. Step 3: Cross multiply
    673,884x = 930,078.72 × 401,968.80
  4. Step 4: Simplify right side
    673,884x = 373,862,626,983.94
  5. Step 5: Solve for x
    x = 373,862,626,983.94/673,884
  6. Step 6: Final answer
    x = 554,787.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.