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Finding the Fourth Proportional to 644,920.80, 967,381.20 and 408,530.40

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Solution

The fourth proportional to 644,920.80, 967,381.20 and 408,530.40 is: 612,795.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,920.80 : 967,381.20 = 408,530.40 : x
  2. Step 2: Convert to fraction form
    644,920.80/967,381.20 = 408,530.40/x
  3. Step 3: Cross multiply
    644,920.80x = 967,381.20 × 408,530.40
  4. Step 4: Simplify right side
    644,920.80x = 395,204,628,588.48
  5. Step 5: Solve for x
    x = 395,204,628,588.48/644,920.80
  6. Step 6: Final answer
    x = 612,795.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.