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Finding the Fourth Proportional to 687,341.70, 948,506.63 and 381,431.43

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Solution

The fourth proportional to 687,341.70, 948,506.63 and 381,431.43 is: 526,361.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,341.70 : 948,506.63 = 381,431.43 : x
  2. Step 2: Convert to fraction form
    687,341.70/948,506.63 = 381,431.43/x
  3. Step 3: Cross multiply
    687,341.70x = 948,506.63 × 381,431.43
  4. Step 4: Simplify right side
    687,341.70x = 361,790,238,338.22
  5. Step 5: Solve for x
    x = 361,790,238,338.22/687,341.70
  6. Step 6: Final answer
    x = 526,361.54

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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.