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Finding the Fourth Proportional to 687,089.50, 948,185.90 and 381,171.94

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Solution

The fourth proportional to 687,089.50, 948,185.90 and 381,171.94 is: 526,018.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,089.50 : 948,185.90 = 381,171.94 : x
  2. Step 2: Convert to fraction form
    687,089.50/948,185.90 = 381,171.94/x
  3. Step 3: Cross multiply
    687,089.50x = 948,185.90 × 381,171.94
  4. Step 4: Simplify right side
    687,089.50x = 361,421,857,077.79
  5. Step 5: Solve for x
    x = 361,421,857,077.79/687,089.50
  6. Step 6: Final answer
    x = 526,018.60

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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.