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Finding the Fourth Proportional to 687,267.06, 948,475.90 and 385,480.50

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Solution

The fourth proportional to 687,267.06, 948,475.90 and 385,480.50 is: 531,989.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,267.06 : 948,475.90 = 385,480.50 : x
  2. Step 2: Convert to fraction form
    687,267.06/948,475.90 = 385,480.50/x
  3. Step 3: Cross multiply
    687,267.06x = 948,475.90 × 385,480.50
  4. Step 4: Simplify right side
    687,267.06x = 365,618,964,169.95
  5. Step 5: Solve for x
    x = 365,618,964,169.95/687,267.06
  6. Step 6: Final answer
    x = 531,989.65

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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.