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Finding the Fourth Proportional to 681,408.10, 940,385 and 375,484.31

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Solution

The fourth proportional to 681,408.10, 940,385 and 375,484.31 is: 518,191.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,408.10 : 940,385 = 375,484.31 : x
  2. Step 2: Convert to fraction form
    681,408.10/940,385 = 375,484.31/x
  3. Step 3: Cross multiply
    681,408.10x = 940,385 × 375,484.31
  4. Step 4: Simplify right side
    681,408.10x = 353,099,812,859.35
  5. Step 5: Solve for x
    x = 353,099,812,859.35/681,408.10
  6. Step 6: Final answer
    x = 518,191.39

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1.5x scale

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.