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Finding the Fourth Proportional to 687,453.75, 948,692.66 and 385,654.23

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Solution

The fourth proportional to 687,453.75, 948,692.66 and 385,654.23 is: 532,206.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,453.75 : 948,692.66 = 385,654.23 : x
  2. Step 2: Convert to fraction form
    687,453.75/948,692.66 = 385,654.23/x
  3. Step 3: Cross multiply
    687,453.75x = 948,692.66 × 385,654.23
  4. Step 4: Simplify right side
    687,453.75x = 365,867,335,370.68
  5. Step 5: Solve for x
    x = 365,867,335,370.68/687,453.75
  6. Step 6: Final answer
    x = 532,206.47

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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.