Home / 627,918.40-939,727.20-378,779.20

Finding the Fourth Proportional to 627,918.40, 939,727.20 and 378,779.20

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Solution

The fourth proportional to 627,918.40, 939,727.20 and 378,779.20 is: 566,871.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,918.40 : 939,727.20 = 378,779.20 : x
  2. Step 2: Convert to fraction form
    627,918.40/939,727.20 = 378,779.20/x
  3. Step 3: Cross multiply
    627,918.40x = 939,727.20 × 378,779.20
  4. Step 4: Simplify right side
    627,918.40x = 355,949,117,034.24
  5. Step 5: Solve for x
    x = 355,949,117,034.24/627,918.40
  6. Step 6: Final answer
    x = 566,871.61

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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.