Home / 677,000.70-1,015,209.45-339,911.10

Finding the Fourth Proportional to 677,000.70, 1,015,209.45 and 339,911.10

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Solution

The fourth proportional to 677,000.70, 1,015,209.45 and 339,911.10 is: 509,720.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,000.70 : 1,015,209.45 = 339,911.10 : x
  2. Step 2: Convert to fraction form
    677,000.70/1,015,209.45 = 339,911.10/x
  3. Step 3: Cross multiply
    677,000.70x = 1,015,209.45 × 339,911.10
  4. Step 4: Simplify right side
    677,000.70x = 345,080,960,879.90
  5. Step 5: Solve for x
    x = 345,080,960,879.90/677,000.70
  6. Step 6: Final answer
    x = 509,720.24

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Double scale
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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.