Home / 711,631.90-982,209.66-491,178.70

Finding the Fourth Proportional to 711,631.90, 982,209.66 and 491,178.70

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Solution

The fourth proportional to 711,631.90, 982,209.66 and 491,178.70 is: 677,935.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,631.90 : 982,209.66 = 491,178.70 : x
  2. Step 2: Convert to fraction form
    711,631.90/982,209.66 = 491,178.70/x
  3. Step 3: Cross multiply
    711,631.90x = 982,209.66 × 491,178.70
  4. Step 4: Simplify right side
    711,631.90x = 482,440,466,074.96
  5. Step 5: Solve for x
    x = 482,440,466,074.96/711,631.90
  6. Step 6: Final answer
    x = 677,935.42

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Half scale
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Double scale
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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.