Home / 811,913.40-1,217,870.10-251,119.80

Finding the Fourth Proportional to 811,913.40, 1,217,870.10 and 251,119.80

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Solution

The fourth proportional to 811,913.40, 1,217,870.10 and 251,119.80 is: 376,679.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,913.40 : 1,217,870.10 = 251,119.80 : x
  2. Step 2: Convert to fraction form
    811,913.40/1,217,870.10 = 251,119.80/x
  3. Step 3: Cross multiply
    811,913.40x = 1,217,870.10 × 251,119.80
  4. Step 4: Simplify right side
    811,913.40x = 305,831,295,937.98
  5. Step 5: Solve for x
    x = 305,831,295,937.98/811,913.40
  6. Step 6: Final answer
    x = 376,679.70

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.