Home / 919,050.80-1,378,576.20-665,140.10

Finding the Fourth Proportional to 919,050.80, 1,378,576.20 and 665,140.10

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Solution

The fourth proportional to 919,050.80, 1,378,576.20 and 665,140.10 is: 997,710.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,050.80 : 1,378,576.20 = 665,140.10 : x
  2. Step 2: Convert to fraction form
    919,050.80/1,378,576.20 = 665,140.10/x
  3. Step 3: Cross multiply
    919,050.80x = 1,378,576.20 × 665,140.10
  4. Step 4: Simplify right side
    919,050.80x = 916,946,311,525.62
  5. Step 5: Solve for x
    x = 916,946,311,525.62/919,050.80
  6. Step 6: Final answer
    x = 997,710.15

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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.