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Finding the Fourth Proportional to 687,357.96, 948,551.94 and 381,480.42

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Solution

The fourth proportional to 687,357.96, 948,551.94 and 381,480.42 is: 526,441.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,357.96 : 948,551.94 = 381,480.42 : x
  2. Step 2: Convert to fraction form
    687,357.96/948,551.94 = 381,480.42/x
  3. Step 3: Cross multiply
    687,357.96x = 948,551.94 × 381,480.42
  4. Step 4: Simplify right side
    687,357.96x = 361,853,992,463.02
  5. Step 5: Solve for x
    x = 361,853,992,463.02/687,357.96
  6. Step 6: Final answer
    x = 526,441.84

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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.