Home / 1,211,689.80-1,817,534.70-412,900.20

Finding the Fourth Proportional to 1,211,689.80, 1,817,534.70 and 412,900.20

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Solution

The fourth proportional to 1,211,689.80, 1,817,534.70 and 412,900.20 is: 619,350.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211,689.80 : 1,817,534.70 = 412,900.20 : x
  2. Step 2: Convert to fraction form
    1,211,689.80/1,817,534.70 = 412,900.20/x
  3. Step 3: Cross multiply
    1,211,689.80x = 1,817,534.70 × 412,900.20
  4. Step 4: Simplify right side
    1,211,689.80x = 750,460,441,136.94
  5. Step 5: Solve for x
    x = 750,460,441,136.94/1,211,689.80
  6. Step 6: Final answer
    x = 619,350.30

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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.