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Finding the Fourth Proportional to 670,625.12, 925,385.10 and 384,128.12

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Solution

The fourth proportional to 670,625.12, 925,385.10 and 384,128.12 is: 530,052.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,625.12 : 925,385.10 = 384,128.12 : x
  2. Step 2: Convert to fraction form
    670,625.12/925,385.10 = 384,128.12/x
  3. Step 3: Cross multiply
    670,625.12x = 925,385.10 × 384,128.12
  4. Step 4: Simplify right side
    670,625.12x = 355,466,438,739.01
  5. Step 5: Solve for x
    x = 355,466,438,739.01/670,625.12
  6. Step 6: Final answer
    x = 530,052.38

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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.