Home / 712,286.61-982,955.35-389,996.62

Finding the Fourth Proportional to 712,286.61, 982,955.35 and 389,996.62

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Solution

The fourth proportional to 712,286.61, 982,955.35 and 389,996.62 is: 538,195.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,286.61 : 982,955.35 = 389,996.62 : x
  2. Step 2: Convert to fraction form
    712,286.61/982,955.35 = 389,996.62/x
  3. Step 3: Cross multiply
    712,286.61x = 982,955.35 × 389,996.62
  4. Step 4: Simplify right side
    712,286.61x = 383,349,267,670.15
  5. Step 5: Solve for x
    x = 383,349,267,670.15/712,286.61
  6. Step 6: Final answer
    x = 538,195.25

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Double scale
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Similar ratio
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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.