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Finding the Fourth Proportional to 712,197.47, 982,832.74 and 389,928.03

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Solution

The fourth proportional to 712,197.47, 982,832.74 and 389,928.03 is: 538,100.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,197.47 : 982,832.74 = 389,928.03 : x
  2. Step 2: Convert to fraction form
    712,197.47/982,832.74 = 389,928.03/x
  3. Step 3: Cross multiply
    712,197.47x = 982,832.74 × 389,928.03
  4. Step 4: Simplify right side
    712,197.47x = 383,234,032,178.06
  5. Step 5: Solve for x
    x = 383,234,032,178.06/712,197.47
  6. Step 6: Final answer
    x = 538,100.81

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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.