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Finding the Fourth Proportional to 712,208.08, 982,858.80 and 389,912.80

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Solution

The fourth proportional to 712,208.08, 982,858.80 and 389,912.80 is: 538,086.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,208.08 : 982,858.80 = 389,912.80 : x
  2. Step 2: Convert to fraction form
    712,208.08/982,858.80 = 389,912.80/x
  3. Step 3: Cross multiply
    712,208.08x = 982,858.80 × 389,912.80
  4. Step 4: Simplify right side
    712,208.08x = 383,229,226,712.64
  5. Step 5: Solve for x
    x = 383,229,226,712.64/712,208.08
  6. Step 6: Final answer
    x = 538,086.04

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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.